Those who have asked about sizing; if you click on the link Schmunkee posted in her first post, there's a sizing guide link from the product page.
If it helps, they seem fairly true to size as compared with similar tops from other manufacturers (Salomon, More Mile, Adidas etc). I ordered a small and it was as expected. The only thing I would say is that they do seem to be a little bit shorter in length, but otherwise great. Very lightweight material too.
I am pretty fortunate in that I live fairly close by, so was able to register, rack and collect pretty much at my leisure over the duration of race weekend.
You will need to register at the Macron stadium (about 5 miles out of town) in the days leading up to the race.
The day before the race, you will need to take your bike down to Pennington Flash (also about 5 miles out of town) to rack, and then head on up to the Macron stadium again to drop off your run bag.
The day of the race you will need to get to Pennington Flash. I believe there are buses laid on, but I've never used them.
After the race, you can collect your swim and streetwear bags from the finish line in the town centre (though this might have changed this year), but you'll then need to go up to the Macron again to get your run bag and bike. Again, buses might be laid on, but how frequent these are I'm not sure.
As for spectators, Pennington Flash is not particularly well connected for buses etc, especially at 8am on Sunday morning, so they'll either need to drive or taxi it back to Bolton.
Ideal scenario is for someone (i.e. a spectating partner or friend) to ferry you round in the days leading up to, and after, the race. They will therefore be able to drive to and from Penny Flash on race day.
Pie n Man - yes, you can collect your bike the day after race day.