I've just noticed this too - and it's really annoying and an extremely shady practice. I thought the computer I was on was infected with a virus or something.

Considering a lot of FTers use websites for their own gains where they may earn cashback etc. For example I earn a bit of money on Hilton bookings through Quidco. Presumably if I clicked Hilton links the money would have gone to FT had I not noticed the redirecting.at url.

Shame on FT