Britain's Queen Elizabeth's composer is writing a "comic opera" poking fun at the MPs' expenses scandal. Sir Peter Maxwell Davies is so annoyed by the fraudulent expense claims made by British MPs - which include claims for pornographic films and moat cleaning costs - he has decided to express his anger through song.

He explained: "Like everybody else I'm outraged over the extent and depth of the MPs' expenses claims. I am registering and expressing my disgust the best way I can - through my music."

"I may even invite a few MPs to the opening night - they will of course want free tickets, but be able to claim them on expenses for some fictitious fee!"

Calling MPs a "public disgrace", Davies added he also plans to take British bankers - who many blame for the UK's ongoing financial crisis - to task.

He told Britain's Independent newspapers: "These people are a public disgrace and deserve to be publicly disgraced on stage. The bankers are also in for a rough ride in the work too."

The extent of the expenses scandal became apparent after a series of exposes by Britain's Daily Telegraph newspaper.

Since details of the claims became public, MPs have repaid more than $815,000 - with Prime Minister Gordon Brown paying back over $1300 - and 20 MPs have decided to stand down.