oops been studying for my FAA biannual (have to remember i ain't allowed SVFR on a VFR PPL). The FAA charts do have a valid from and to.
If i remember rightly chart updates are issued via AIC (green) updates in the UK.
And can be checked at
http://www.ais.org.uk/
I am off to find that Issue 12 for Scotland which i found the other week to chuck it in the bucket.
MJ