Korean UNESCO postcards from the UK

I have a few Korean UNESCO postcards in London. I am not able to send them from Korea. I can only post them from the UK or in an envelop.

KR1264-1 Jeju Volcanic Island (0 available)
05/01/10 1 postcard on its way to sylwiail (lost in post, resent) in exchange for MX791 - Pre-Hispanic Town of Uxmal (received)

KR1264-2 Jeju Volcanic Island and Lava Tubes (0 available)

21/10/09 1 postcard on its way to Bodexs (received) in exchange for PL30 - Historic Centre of Warsaw (Completed)
11/11/09 1 postcard on its way to sternchen84(received) in exchange for DE168 - Speyer Cathedral (Completed)
14/02/2011 1 postcard on its way to seetas (received) in exchange for IN244 - Elephanta Caves (Completed)

KR817 - Hwaseong Fortress (0 available)

21/10/09 1 postcard on its way to Bodexs (received) in exchange for PL29 - Cracow's Historic Centre (Completed)

23/11/09 1 postcard on its way to SLLiew (received) in exchange for KR1264 - Jeju Volcanic Island (Completed)