Malc if the UK is any thing like NZ the price will be through the roof.
I have found that I can import blades from the US cheaper than I can buy local.
I also imported some clamps for the saw from the UK, in NZ they were 3 times dearer, go figure.
Some one is making money and I in my infinite wisdom said it was't going to be my hard earned cash.
So FD blades from Mike's if I'm not mistaken will be your best bet.
Just my 1.25 cents worth of information.
Merlin