London's entire Tube network will be closed all day, as Underground staff continue their strike over pay and conditions.

A preview of what travelling through the capital will look like on Thursday was already seen last night – as huge queues began to form in Oxford Circus, and busy stations shut their doors.

Although 250 extra buses are being laid on by Transport for London, gridlock on the roads is expected as determined commuters switch to their cars in a bid to get to work on time.

London Overground and the Docklands Light Railway are also expected to feel the strain.

These services will be running as normal, but travel bosses have warned they are likely to be a lot busier than usual – especially during peak times.

Outside Tube stations, picket lines are being mounted, as workers from four unions protest about plans to launch a 24-hour "Night Tube" service on some lines at weekends from 12 September.

Constructive talks between TfL and the unions appeared to have stalled.

Boris Johnson has insisted that Underground staff are being offered a "very generous deal" and warned no further money would be authorised during negotiations – even if it meant delaying the launch of the Night Tube.