Hi - I know Swindon Council are about to open their own cloth nappy shop (in next couple of months) - to be run by the real nappy network. Not sure whether they will be selling or whether it will just be an information place - but sounds great!
Your idea sounds great - have you thought about becoming a nappy advisor so that you can access many brands without the huge investment in stock? This is what I have done, but am now moving on towards trade. Don't think will ever own a shop!
BTW if you would like to stock monkey foot bags I am now the UK distributor - have a look on my site - pm me if interested and will send you supplier T&C. I think at some point I will move on from nappies into a distributorship capacity tbh.
If I had the choice - I would stock
BG onesize - they are bringing out a new nappy in september
Weenotions
EasyPeasy bimbles
Lollipop softee
Fuzzis
Close Parent - pop in and dream dri
Sandys - great nappy
Bambinex bamboo btp
Then a couple of custom wahm things!

Love puddlekins and UD!