The postal service has warned that some customers may have to wait longer than usual for their post to arrive.

Royal Mail operates an air, rail and road network to keep post and parcels moving between distribution hubs and processing centres.

However, severe weather, which prompted red and amber weather warnings on Saturday, December 7, has disrupted the normal travel route for letters and parcels.

A statement from Royal Mail read: “Strong winds delayed the departure of mail travelling from our Midland Hub to Exeter and Cardiff.

“As a result, some mail posted in other parts of the UK, due for delivery in the EX and CF postcode areas may arrive later than planned.”

Elsewhere in England and Wales, red weather warnings delayed mail's departure from the south-west of England parcel hub to Cardiff and Swansea.

Customers have been warned that some mail posted yesterday in other parts of the UK to Cardiff (CF) and Swansea (SA) postcode areas may be delayed. The same warnings apply to post due for delivery in certain Bristol and Dorset postcodes.

Royal Mail customers should anticipate delays in post arriving to:

• Postcodes BA, BS, GL and TA

Delays are also likely for mail posted in the following postcode areas due for delivery elsewhere in the UK:

• Wales: CF, SA, LD, and NP
• Dorset: BH and DT

Elsewhere in the UK, deliveries due today have been impacted due to high local issues in delivery offices (DO).

Royal Mail says the following areas are “most impacted” today:

• Abingdon DO (OX13 and OX14)
• Basingstoke DO (RG21-RG26 and RG28)
• Bethnal Green DO (E2, E8 and E9)
• Bow DO (E3)
• Burnham On Sea DO (TA8 and TA9)
• Canterbury DO (CT1 - CT6)
• Carterton DO (OX18)
• Clevedon DO (BS21 and BS49)
• Coalville DO (LE67)
• Fareham DO (PO14 - PO17)
• Finchley Church End DO (N3)
• Frome DO (BA11)
• Gosport DO (PO12 and PO13)
• Hyde DO (SK13, SK14 and SK16)
• Keith DO (AB55)
• Leicester East DO (LE2, LE5 and LE7)
• Margate DO (CT7 - CT9)
• Oxford East DO (OX3, OX4, OX33, OX44 and OX49)
• Ongar DO (CM5)
• Plymouth North DO (PL2 and PL3)
• Plympton DO (PL7)
• Portsmouth DO (PO1 – PO6)
• Radstock DO (BA3)
• Reading East DO (RG4 - RG6 and RG10)
• Swan House DO (LE1, LE3, LE7, LE8, LE9, LE19 and LE95)
• Thatcham DO (RG18 and RG19)
• Tonbridge DO (TN1-TN5 and TN9-TN12)
• Wallingford DO (OX10 and OX49)
• Wantage DO (OX12)
• Waterlooville DO (PO7 and PO8)
• Whetstone DO (N20)
• Wilmslow DO (SK9)

Anyone posting parcels or packages for Christmas should know that final posting dates are looming.

Royal Mail has urged customers to double-check that they address their Christmas post correctly. The full address, including the complete postcode, should be written on all items.

The postal service warned that checking your postage is correct is also vital to avoid delays or additional charges for the recipient.

Express.co.uk has rounded up everything you need to know about sending Christmas post with Royal Mail.