In case you’ve not seen it:
From a TfL notification:
From 21:30 on Friday 24 until 00:01 on Bank Holiday Monday 27 May, Old Street west and City Road south will be closed. This is to complete works to switch Old Street roundabout to two-way traffic.
The Inner Ring Road will remain open through Old Street for east / west journeys. Using the Inner Ring Road south of the river may mean a quicker journey over the weekend. Signed diversion routes will be in place. Roads in the surrounding area are expected to be a lot busier and delays are expected in all directions, so allow more time for your journey.
From Sunday 26 May, vehicles using the service access at Old Street roundabout will exit into the Congestion Charge and Ultra Low Emission zones. Drivers may avoid the Congestion Charge by loading outside of Congestion Charge hours (before 07:00 or after 18:00 from Monday to Friday, or anytime over the weekend). Drivers may also be subject to the ULEZ daily charge if their vehicle does not meet the prescribed emissions standards.
From 00:01 on Bank Holiday Monday 27 May, two-way traffic will be introduced at Old Street roundabout. Delays are expected in all directions on the approach to the Old Street junction, so please allow more time for your journey.
Local businesses should consider taking action to minimise the impact of any delivery or servicing trips made to your premises by talking to your supplier about whether they can re-time their trips to outside of peak hours, or reduce trips by streamlining your suppliers and the number of visits they make to your premises.