UK ROM Help topic

Hello people

I am wishing to flash my Xperia Arc with a stock UK ROM where I do NOT have to unlock the bootloader, I have been reading a very in-depth thread located here http://forum.xda-developers.com/show....php?t=2067008 but for the life of me I cant find where to download a UK Stock firmware and Flashtool, can someone help out as I would like to de-brand my Arc.

Thank You for any help