I have finally decided to switch networks. I've ebayed a new 3 phone and my o2 contract has finally expired allowing me to obtain a PAC number. So now all I need to do is arrange the PAC through o2 on monday, get the business done with three then wait for everything to come together.
Also, since I'm using my old 3toGo tariff I'll have £Nil line rental and also nil freebies, but I might do some add-ons later if required. So that will free up some funds over the month, el colio. Plus my call rates will be much better on three too.