Send the following on WhatsApp
Continue to ChatLlechwedd Slate Caverns Railway 1980 Definitives (5p and 5c, U/M) https://www.grahamlandstamps.co.uk/shop/stamps/cinderellas/gb-railway-letter-labels/llechwedd-slate-caverns-railway/llechwedd-slate-caverns-railway-1980-definitives-5p-5c-u-m/