I thought I had all this sorted but now am getting confused again. Ally seemed to confirm the correctness of my view on my other recent threads which are on this topic ... and he should know.
My understanding was that you buy a £2.99 starter pack, get a web hosting acccount and a domain name with this account.
Suppose then you want another domain with this account with the aim of managing web space on this new domain. I was suggesting that in order to do this you needed to log into the account, buy the domain, and pay another £2.99 for web hosting for this second domain. If you want a third domain on which to host a website then you need to log into the account buy the domain, and pay another £2.99 for webhosting etc (In fact the packate cost is listed as £5 but BT will reimburse the difference.).
One alternative for three domains with webhosting is to have three different £2.99 accounts each with a different username and password.
However ... spank ... you are suggesting another alternative that I don't full understand that involves splitting the 5Gb. Please could you elaborate on this? What do you mean contact the 'desk'. Are you sure with this solution that there will be three clickable links one for each of the three domains when you go into manage domains?
David
