Discovered the other day before a quick spin out that I had a screw in one of the tyres, which accounted for the PSI of only 16.

Bought one of those self repair kits on Amazon where you effectively push in a sticky strip of rubber to seal the hole. Took more force than I imagined, but worked a treat. Plenty of more strips in the hand kit, now gives me reassurance should I pick up a puncture mid journey. Purchased a handy cordless compressor as well which takes up less space than a conventional pump, which automatically stops when at the correct PSI. Jobs a good un.

2004 Series 1 Roadster