All GWR trains between to London Paddington have been either cancelled or delayed this morning due to an electrical problem.

Damage to overhead electric wires meant cancellations and delays of up to 90 minutes, with at least one train set to be evacuated amid ongoing postponements.

GWR said on Twitter: "Due to damage to the overhead electric wires between Slough and London Paddington all lines are blocked.

"Train services running to and from these stations will be cancelled, delayed or revised. Disruption is expected until the end of the day."

Some local buses and other train companies are accepting GWR rail tickets in affected areas.

As today marks Queen Elizabeth's funeral in London, many are expected to use the trains to watch it in either London or Windsor.

Slough is a change point between Paddington and Windsor and Eton Central – one of two stations serving Windsor Castle, the monarch's final resting place after the Monday afternoon procession from London.

Great Western Railway (GWR) confirmed in a Tweet the 6.25am service to Slough was "to be evacuated" just after 8.45am, after passengers found themselves "stuck" for over two hours just outside Paddington.

GWR initially signalled disruption would cease by 10am, an hour before the start of the funeral, but confirmed on social media shortly before that time there were still "severe delays on services... due to damage to the overhead electric wires".