Screw in back tyre - repair or not?

[Fuzzy]

Forgot to say, those diy kits are generally done from the outside. They are really intended as a temporary repair though to get you home. I can recommend keeping this under your seat:

http://www.ebay.co.uk/itm/Rema-Tip-Top-T...4613a3044b

I think these are standard equipment on BMWs so they must be pretty decent.

As for a permanent repair - get the tyre professionally repaired and forget about it imo.