(Alliance News) - The following is a round-up of updates by London-listed companies, issued on Wednesday and not separately reported by Alliance News:

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NetScientific PLC - life sciences and sustainability technology investment firm - Reports that John Clarkson has stepped down as chair and resigned from the board with immediate effect. Says that Non-Executive Director Jonathan Robinson will now become interim non-executive chair while the company completes its recruitment process to appoint a new chair.

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PetroNeft Resources PLC - Ireland-based, Russian-focused oil and gas exploration and production company - Extends the maturity date for its loan facility to March 15. The loan facility has a current redemption value of USD2.5 million, it adds. Cash and cash equivalents for PetroNeft Group stand at USD439,566 as at January 31.

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Scancell Holdings PLC - Nottingham, England-based cancer immunotherapies developer - Appoints Jean-Michel Cossery as chair with immediate effect. Says that he has over 25 years of experience in the pharmaceutical and biotechnology industries.

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By Abby Amoakuh, Alliance News reporter

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