A33 Northbound blocked queueing traffic, long delays due to accident and recovery work between Imperial Way and Bennet Road / Smallmead Road / Northern Way (Madejski Stadium), congestion on A33 to M4 J11 / B3270 (Reading).
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The rapper joins previously announced headliners Kasabian and Muse at the top of the bill.
Friday morning's forecast for the east of the region
Friday morning's forecast for the west of the region