So I seem to have developed magnetic tyres because they are picking up every sodding nail and screw in West London. I've had 2 new back tyres in 3 weeks and I'm getting sick of being stranded. So, what's the general wisdom regarding carrying a repair kit? Which type; the plug type or a can of sealing stuff? I never feel confident on a tyre with a plug and always want to just get it home or to a tyre fitter.