If you got shin splints that badly that quickly then you were trying to do far too much too soon, so you know that trying to follow your previous programme will not work.
Find a beginner's programme (such as C25K) which combines running and walking. If you find that the pain is returning, then repeat that week (more than once if necessary) until you can complete it without the pain (unless it is so bad that complete rest is required, in which case restart at the beginning of the programme after your complete rest: don't go back in at the level which was causing you injury). This might mean that you take a bit longer to join the military than you want but overall this strategy should be quicker than allowing a really serious injury to develop.
I'd also advise going to a running shop (a proper one, not a general high street sports store) and trying some trainers on before buying them to make sure they are right for you. You can explain you are on a budget and would therefore prefer to buy the previous year's models, which are likely to be discounted.
14M last night and 10M this morning. Legs were feeling pretty good last night and rubbish this morning!
Wardi: plan is about 7 easy, 7 steady and 6 @ MP, although I might switch to 6, 6, 8 depending on how the legs feel. I've got the Wokingham half as a PMP run next weekend so I don't want to do too much this weekend.
11M for me last night and need to get my 14M done today so that I can have a mini-taper ahead of Bramley (Mr. Jools - Joolski? - is now working most of the weekend, so I get a Bramley pass). Anyone else going to be there?