Light Science Technologies Holdings PLC (AIM:LST), the green tech developer, stormed 40% higher after former ITM Power boss Graham Cooley upped his stake in the firm from 3.3% to 4.8%.

Cooley spent over 13 and a half years as chief executive officer at the hydrogen electrolyser group ITM Power before stepping down in January.

Under his tenure shares soared more than 3,000% in the space of a couple of years.

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