I did a lot of searching and found even though The Bike Insurer claimed they had the cheapest quotes for various companies, both Motorcycle News and Tesco quoted cheaper. I went with MCE for £160 TPF&T including breakdown and legal. The bike is chained to a concreted in ground anchor and has a cover. It is right next to a lamp post, but a ground anchor means the chain is not trailing along the pavement and is harder to get at to cut.
I did have an issue with MCE in that it took 5 emails and 2 weeks to get the documents through.