The basic idea is an advert for a charity appeal like the ones you get for the PDSA or RSPCA going something like this...
[Voiceover] This is Gordon. He was abandoned by his voters, abused and kicked by the press and left by the side of the road without a second home to claim for. We at the House of Lords need your money to help Gordon and other failed politicians like him to find a new home and give them a purpose before they write their memoirs. Please help us keep these crappy boring books of our shelves and out of our newspapers by donating as little as £10.00 a month. Thank you.
And you could do similar voiceovers for all the other big politicians who loose their seat.
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