Yeah most of the tops designed for trail running (usually also have a half zip) have pockets, look at inov8 as well. Shorts usually have adequate space for gels but if not get maybe an armband pocket; that should fit an asthma pump, or a running bumbagh of some sort. I don't like them so will try and squeeze whatever i need into various other pockets but others have no problems.
Same - I tried L-cartinine f about 6 months a year and a half ago. Made no noticeable difference and was incredibly expensive on a student budget so I stopped. You most definitely do not look like you need lose any weight but cleaning up my diet over a month of the summer holiday made a much more noticeable difference in terms of weight loss, and that was just through eating a it less junk not shelling out loads on supplements! Also read something a bit scary about the side-effects when l-cartinine is converted into TMAO in the body, according to one study it promotes atherosclerosis which was a big concern for me as heart disease runs in my family on both sides! But google that for more details to make up your own mind as it was just one study.
Interesting thing is,that in terms of rewarding regular participation (regardless of time/finishing position) parkrun already has the 50, 100, 250 t--shirt clubs and the Sweatshop monthly prize. I guess then the points competition rewards commitment to one event (despite parkrun nowadays seemingly promoting 'run tourism'...)
Don't race every week, r even every fortnight. That would burn anyone out not only physically but also psychologically. Insomnia and lack of concentration could be due to overtraining. Maybe try cutting down to one session a day?
Answering all your questions on this topic would make for very lengthy post as the claim status rules are pretty complicated, So I shall refer you to this link for Welsh athletics: http://www.welshathletics.org/athletes/athlete-transfers--forms.aspx . You don't need to wait until membership renewal time to change clubs, you can do it at any time of the year BUT according to England athletics' rules at least before submitting the form you must first formally resign from your previous first-claim club and gain a club official's 'approval' so to speak. So if you want to switch to second-claim,you may have to re-join that club with a different claim status. Often if the clubs are in a similar geographical area may be more hassle than its worth - may i ask why you wish to change your 1st claim?
As for competition, yo must represent your fist claim club in all disciplines to which it is affiliated to the Welsh athletics, eg. if Club A 1st claim is affiliated for xc,track and road you must represent them in those races but can represent club B in a fell race,if that club is affiliated to fell. I don't think they are too fussed about parkruns. Low-key local or road races may turn a blind eye but you need to be aware of this rule all the same; often only first-claim club runners are eligible for team awards for example. Unfortunately unless you race a lot on the fells 2nd claim often doesn't offer very much except extra training opportunities.Hope this helps!