London Bridge rail station reopened on Monday at 5am but as exit only, while the Underground station will be open, Transport for London (TFL) confirmed.
But TfL has advised travellers to avoid using the station if possible to avoid overcrowding, although commuters will be able to travel in and around the area.
A TfL statement said: “The station will be much busier than usual and there may be queuing systems in place. Passengers are advised to avoid London Bridge station during Monday’s morning peak if at all possible.”
The Metropolitan Police said cordons have been put in place that could remain “well into Monday” while officers continue with their investigations.
Met assistant commissioner Mark Rowley asked the public to “avoid the area as our investigation is ongoing”.
He added: “This will have an impact on travel arrangements as we head in to Monday morning, and would ask everyone to check with their travel operators and seek alternative routes wherever possible.”
British Transport Police said people may notice an increased police presence following the attacks, which killed seven and left dozens more injured.
In a statement, the force said: “Members of the public should expect to see extra police officers patrolling stations in London and the south east following the attacks. You may also see some of our armed police officers at stations.”
An area of Borough High Street and Market is closed, as well as Montague Close and Stoney Street.
Barriers have been installed overnight on some of London’s bridges in response to the terror attack.
Pedestrians who usually walk across London Bridge are advised to use London Underground services or National Rail services to Charing Cross, Waterloo East, Cannon Street, Blackfriars and Victoria stations.
Tube & Rail
London Bridge station will reopen on Monday 5 June from 05:00.
Trains will still run to/from London Charing Cross, Waterloo East and London Cannon Street.
It is recommended you travel to Waterloo East or Cannon Street and complete your journey towards London Bridge on foot or by other Public Transport where possible.
From Waterloo East you can use London Underground services and London buses 251 & RV1.
From Cannon Street you may need to walk via Southwark bridge/The millennium bridge or Tower bridge (London Bridge River Crossing will be closed).
London underground stations at Borough and London Bridge will be open, with London Bridge underground exit & entrance onto Tooley street.
Disruption between Bedford and London Blackfriars up until 9.00am due to a “signalling fault”.
Monument station has reopened.
Waterloo and City line service will resume at 6.15am.
Pedestrians
TfL have advised against walking along London Bridge.
Instead, pedestrians should use “alternative walking routes across the river include Tower Bridge, Southwark Bridge, the Millennium Bridge (use Borough Underground station) and Blackfriars Bridge (use Southwark Underground station).”
Road Closures
A104 Essex Road (All directions)
A112 Angel Lane (Southbound)
A200 Tooley Street and Duke Street Hill(Eastbound) between A3 Borough High Street and A2205 Bermondsey Street
A3 King William Street (Both Directions)