Its easy to vote by post in the Council and Euro elections on May 22nd. Just fill in a postal vote form and get it back to the town hall by Wednesday 7th May. Your ballot papers arrive by post about a week in advance of election day giving you plenty of time to post back your vote in your local post box.
To apply see:
http://www.lambeth.gov.uk/elections-and-council/elections/elections-guide#postal-&-proxy-voting