About 5 years ago it was around 2.45 - 2.50 , we waited patiently for it to hit 2.60 to change our money, since then it has yo yoed up and down as low as 2.20 ish and high as 2.87 ish. We've got it licked, when it's low we use our T Lira and when its high we draw sterling and change it.
When calculating "how much is this in £'s roughly" we go by 2.5TL/£.