2026 Royal Mail "Castles" Official First Day Cover

A official First Day Cover issued by Royal Mail on 21st May 2026 as part of the "Castles of the United Kingdom" series. The cover showcases all eight 1st Class stamps featuring iconic historic castles across England, Wales, Scotland, and Northern Ireland, postmarked with the official pictorial First Day of Issue handstamp depicting a drawbridge and portcullis.
Featured Castles on Stamps:
England: Warwick Castle & Bamburgh Castle
Northern Ireland: Dunluce Castle & Dundrum Castle
Scotland: Urquhart Castle & Stirling Castle
Wales: Raglan Castle (Castell Rhaglan) & Pembroke Castle (Castell Penfro)

Specifications:
Spec / Detail:
Issuer: Royal Mail (UK)
Issue Date: 21 May 2026
Stamp Set: Complete set of 8 × 1st Class "Castles" stamps
Postmark: Castleton, Hope Valley Special Handstamp (21.5.2026)
Format: Hand-addressed Official Envelope