I have started a Facebook group for all UK Lido users, basically because I couldn't find one. It is a place to share updates on lidos, campaign for reopening of pools and generally witter on about the joys of outdoor swimming.
Please check it out http://www.facebook.com/group.php?gid=104294749627897&v=wall#!/group.php?gid=104294749627897&v=wall
To get you in the mood here's a pic of the recently reopened Uxbridge Lido. Wonderful Art Deco buildings - rubbish grey sky
