Royal Mail has advised that not all mail was processed to schedule at its London Central and Sheffield Mail Processing Centres yesterday. Customers should expect delays in the following areas:

• London Central North Mail Centre: Some mail posted in parts of the EC, N, W1 and WC postcode areas, for delivery across other parts of the UK.
• Sheffield Mail Centre: Some mail posted in parts of the DN, HU, LN and S postcode areas, for delivery across other parts of the UK.