We got ours from Kodak but there is also Greeenbee at John Lewis, Debenhams, Ecclesiastical, Confetti.
Which ever one u get , it is essential in these uncertain times and probably the best £50ish that you will ever spend for the reassurance[ but always read small print]
Try WeddingPlan too (who I've gone with). The E&L one is cheap but I've read lots of angry rants about them not paying up when people claim - so buyer beware! x
Alot of people have said negative comments about E&L, I think at the end of the day, if you read the small print and are happy to agree to the t&cs then you're fine. at the end of the day, no insurance company is going to be happy to pay out loads of money. I think just make sure you read the t&cs of whatever you decided to go with.