Amazon.co.uk has a double CD of The Last Night of the Poms listed on their web-site. The release date is 4th September 2009 so it can’t be an audio recording of the recent performances. Unfortunately there is very little information other than it’s a 2009 digital remaster that is labeled as being an ‘import’. It is also available as an MP3 download. The Sir Les related tracks are :-
You could just buy those 3 Sir Les tracks for £7.37 but you may as well buy them all for just £8.69.
This audio is also available on iTunes for £9.99.