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Internet-of-Things specialist Starcom PLC (LON:STAR) fell 16.7% to 0.9p in late-afternoon after the firm said the coronavirus pandemic had caused delays to client orders and also held back supply and delivery chains from its factory.

As a result, the group said it did not expect to achieve “levels of growth previously anticipated” if restrictions on travel and global uncertainty continued for a sustained period, although it said cost saving measures and government assistance meant it was confident that it will “survive and come out of this tough period”.

In the risers, Jangada Mines PLC (LON:JAN) surged 16.2% to 1.5p as it announced the completion of a drilling programme at its Pitombeiras vanadium project in Brazil.

The company said the drilling had intersected significant mineralisation of vanadium titanomagnetite and the company will be ready to calculate an initial JORC resource estimate for the project once it receives the remaining 11 drill hole results.

1.30pm: Hemogenyx soars as it begins project to develop coronavirus treatment

HemoGenyx Pharmaceuticals PLC (LON:HEMO) shares soared 34.8% to 2.5p in lunchtime trading after the group began a project to develop potential treatments for coronavirus.

The company said it will use its humanised mice to discover human neutralising antibodies which could be used to combat coronavirus infections.

Elsewhere, polling firm YouGov PLC (LON:YOU) jumped 11.4% to 657p as it said it has yet to see any material impact from the coronavirus pandemic.

The market research firm said a “small minority” of existing clients are requesting payment deferrals or cancellations, handled on a case-by-case basis.

The company also reported that for the six months ended 31 January, revenue jumped by 16% to £76mln with adjusted pre-tax profit up 27% to £12mln.

FTSE 100 construction material group CRH PLC (LON:CRH) was also on the up, rising 7.2% to 2,302p as it maintained its dividend despite shelving a share buyback as the coronavirus pandemic affected demand for its products.

A decision over the final dividend of 63.0 cents per share will be left to shareholders at the FTSE 100-listed group’s annual meeting on Thursday.

11.30am: Gemfields Group duller as it suspends buyback and ruby mine production due to coronavirus pandemic

Gemfields Group Ltd (LON:GEM) lost some of its shine in late-morning, falling 4.6% to 7.8p after the group suspended its share buyback programme and all but critical operations at its Montepuez Ruby Mine in Mozambique as a result of disruption caused by the coronavirus.

The company also said that it had been forced to introduce additional security measures around the site, citing “recent episodes of illegal mining activity” at the site, attacks on its security teams and the recent release of around 150 illegal miners from a nearby prison as part of the Mozambique government’s response to the pandemic.

Meanwhile, formal clothing retailer Moss Bros Group PLC (LON:MOSB) tumbled 24% to 15.6p following news that its buyer wants to scrap the £22.6mln takeover deal.

The high street tailor said that Brigadier Acquisition Company, controlled by rival Crew Clothing’s owner Michael Shina, has contacted the takeover regulator to revoke the offer, adding that it will “take all necessary action” to go ahead with the acquisition, agreed in mid-March.

In the risers, posh tonic maker Fevertree Drinks PLC (LON:FEVR) jumped 16.2% to 1,585p after saying it is committed to paying its final dividend although half of its revenue has been hit by the coronavirus lockdowns.

In a trading update, the soft drinks producer said many on-trade customers, such as pubs and restaurants, which represent 45% of group sales, have been “severely” impacted and it is offering help to them by extending payment terms.

However, Fevertree added, the off-trade channel, such as supermarkets, which account for 55% of group sales, saw a spike in the initial weeks of the coronavirus outbreak as customers stockpiled ahead of isolation.

9.00am: Blackbird flies higher as A+E Networks doubles video editing deal

Blackbird PLC (LON:BIRD) shares flew 10.2% higher to 13.5p in early deals on Wednesday after the cloud video editing specialist said A+E Networks, a joint venture between Hearst and Disney, will double the volume edited through its platform.

The group said the expansion will enable a significant expansion of remote video production capability, allowing its staff to work more effectively while remaining remote.

Elsewhere, biotherapeutics group Avacta Group PLC (LON:AVCT) surged 27.6% to 70.2p as the company said its partnership with life sciences group Cytiva to develop a rapid test for coronavirus was ahead of schedule.

The company said it is aiming to develop a laboratory test for coronavirus within the next few weeks.

And BATM Advanced Communications Limited (LON:BVC) also jumped 13% higher to 53.1p after it received a €29mln (£26mln) order to deliver 1,000 critical care mechanical ventilators to a European government.

The networking tech and medical lab specialist said it has received an upfront fee of €7.25mln and expects the remaining balance to be paid upon completion of the delivery in the second half of 2020.

Proactive news headlines:

BATM Advanced Communications Limited (LON:BVC) said it has received a €29mln (£26mln) order to deliver 1,000 critical care mechanical ventilators to a European government. The networking tech and medical lab specialist said it has received an upfront fee of €7.25mln and expects the remaining balance to be paid upon completion of the delivery in the second half of 2020.

Sativa Group PLC (LON:SATI) revealed it has signed a letter of intent that could lead to the CBD wellness and medicinal cannabis specialist being acquired by OTC, CSE and Frankfurt-quoted StillCanna Inc. Sativa said the would-be buyer is a leader in cannabinoid extraction and agriculture, focusing on the large-scale manufacturing of CBD in Europe. Sativa also announced that it has appointed Peterhouse Capital as its corporate adviser with immediate effect.

Faron Pharmaceuticals Oy (LON:FARN) (NASDAQFIRSTNORTH:FARON) said it has raised gross proceeds of £12.8mln (€14mln) before expenses by selling new shares in the company. The group said the placing, announced on Tuesday after the market close, was significantly oversubscribed and comprises the issue of 2,719,002 Nordic placing shares at the Nordic issue price of €4.00 per share (representing a discount of 7.6% to the closing price of €4.33 on April 21 on Nasdaq First North) and up to 780,998 UK placing shares at the equivalent UK issue price of 348p per share. Faron shares closed trade in London on Tuesday at 395p each.

Pembridge Resources PLC (LON:PERE) has hailed “encouraging” results from operations at its Minto mine in the first quarter of 2020. The firm said over the quarter the mine produced 6,975 wet metric tonnes of concentrate, compared to 7,167 tonnes in the fourth quarter of 2019, while it has also received US$18.7mln in concentrate payments from Japanese firm Sumitomo, up from US$7.1mln in the prior quarter.

Highland Gold Mining Limited (LON:HGM) told investors it produced 63,482 ounces of gold, in line with guidance, for the three months ended March 31, 2020. The Russia-based miner saw an average realised gold price of US$1,593 per ounce during the quarter, and the company repeated its 2020 production guidance for 290,000 to 300,000 ounces of gold and gold equivalent.

Shield Therapeutics PLC (LON:STX) has appointed chief financial officer (CFO), Tim Watts as its new chief executive officer (CEO), replacing outgoing CEO and founder Carl Sterritt who has resigned with immediate effect. Prior to joining the pharma firm, Watts served as CFO of Oxford BioMedica plc (LON:OXB) preceded by 22 years at AstraZeneca PLC (LON:AZN).

NQ Minerals PLC (LON:NQMI) (OTCQB:NQMLF) has unveiled a significant expansion of resources at the Barnes Hill nickel project, as lower grade material is folded into estimates. The new resource now stands at 25mln tonnes, at 0.6% nickel and 0.05% cobalt, up from 14mln tonnes.  Additionally, the group said, findings from metallurgical test work has supported a new flowsheet which is now set to form the basis of the base case in a pre-feasibility study. It includes three-stage leaching and screening for lower grade materials will allow the material to be ‘upgraded’.

Metal Tiger PLC (LON:MTR) has relayed further news from ASX-listed Cobre Limited about a geophysical survey for its Perrinvale project. Downhole electromagnetic surveys (DHEM) have taken place in recently drilled diamond core drill holes across the Schwabe, Zinco Lago and Monti prospect areas at Perrinvale and promising electromagnetic conductors have been identified, Cobre noted. Cobre is 19.99% owned by Metal Tiger and it, in turn, owns 80% of the owner of Perrinvale.

genedrive PLC (LON:GDR), the near-patient molecular diagnostics company, has announced the appointment of finnCap as its joint broker with immediate effect.

AFC Energy PLC (LON:AFC), the industrial fuel cell power company, said it has agreed to grant options over 2,135,000 ordinary shares in the company. The group added that the purpose of the options scheme is to attract, recruit and retain staff and align them with stakeholders’ objectives and the grant includes options that are conditional upon meeting certain commercial targets. It said the options are exercisable at a price of 15.4p per share and will vest between the date of grant and April 20, 2023, and expire on April 20, 2030.