Puncture repair
Lazy/easy option
http://www.ebay.co.uk/itm/Simply-Xtr...0AAOSwLqFV8Ed9 combine with credit card to get it done properly at nearest garage.
Better option
http://www.ebay.co.uk/itm/Motorcycle...sP8F5J7JaJA7sg
Either one will require some kind of pump to fully inflate the tyre afterward. If you have a fag lighter socket on your bike little plug in compressors are pretty cheap. I wouldn't put my faith in the little CO2 canister things you can get, I suspect to go from flat to inflated you'd need a fair few.
I wouldn't go nuts on lugging tools. This is the UK you are unlikely to undertake massive roadside repairs should ****e happen, recovery is more likely. Just take what's needed for basic stuff, like the tools to remove whatever plastics are in the way if you pop a fuse/bulb. I used to lug the best part of a 180 piece toolkit around on my Chinese bikes, along with spare plugs and all sorts, now on my 25 year old kwak I usually just carry a decent leatherman, a few fuses and some leccy tape, 2 breakdowns I've had it's been enough to get me rolling again. 500 miles I'd consider taking the tools needed to adjust the chain and a small can of chain lube as well. My wife's mantra with her car is the best toolkit she can carry is her AA card, if my bike wasn't older than most breakdown services provide cheap cover too I'd probably say the same.