Highways England has announced a long series of weekend and overnight closures at Junction 13 of the M4. The work covers three weekends in April\May and seven weekends in June\July.

The M4 over the top of the roundabout will be closed:(with traffic routed via the roundabout) on the following dates
10pm-6am each night between 21st April 26th April
10pm on Friday 26 April through to 6am on Monday 29 April
10pm on Friday 26 April through to 6am on Monday 29 April
10pm on Friday 10 May through to 6am on Monday 13May
10pm on Friday 17 May through to 6am on Monday 20 May(Contingency weekend subject to change)

The entire roundabout will be closed on the following times and dates:
10pm on Friday 7 June through to 6am on Monday 10 June
10pm on Friday 14 June through to 6am on Monday 17 June
10pmon Friday 21 June through to 6am on Monday 24 June
10pm on Friday 28 June through to 6am on Monday 1 July
10pm on Friday 5 July through to 6am on Monday 8 July
10pm on Friday 12 July through to 6am on Monday 15 July
10pm on Friday 26 July through to 6am on Monday 29 July

There will be significant diversions and severe disruption and queues around the junction.

To get the full details see the Highways Agency letter on the mychieveley website