Commuters are facing delays and several buildings have been damaged after a night of heavy rainfall and thunderstorms.
The storms hit parts of southern England and Wales overnight, with lightning damaging buildings in Sussex and a major railway line in the south west.
The storms are expected to continue throughout Thursday morning, interrupting travel and potentially bringing the threat of floods.
The Met Office said a yellow weather warning remains in place for south-east England until 10am.
It also warned of “difficult driving conditions and some road closures” as commuters reported delays to trains held up on tracks while engineers worked to reconnect power.
National Rail listed a disruption between Westbury in Wiltshire and Castle Cary in Somerset, saying some services could be cancelled or diverted until 9am.
“Lightning damaging the electricity supply between Westbury and Castle Cary means some lines are blocked,’’ an alert issued at 5.30am read. “As a result, trains may be cancelled, delayed or diverted.”
Minor delays are also affecting South Western and Great Western railways while London Transport reported “good service” for all lines despite patches of heavy rain.
