DH is out picking them up now! We had a visit from Cats Protection at the weekend and we went along to the shelter today.
As soon as we got there, two beautiful plump tabby girls (mum and daughter) saw us and came to say hello. They are a little shy, but they've been there for five whole months 
I even got a lick from mum! They are 8 and 9 and were placed because of the breakup of a family; both parents went into rented, unsuitable accommodation. No one wanted them because of their age, but honestly they are two of the sleekest, most lovely girls I've ever seen in my life.
There were a younger b/g pair, but I actually cried at the thought of leaving them behind. So now I'm filling litter trays and waiting for the return on DH.
I'm taking DS straight from school to a play date, so they will have a quiet house to nose about. I've told DH to open the crates in the kitchen and just sit and the table and play on his iPad maybe do his tax return and let them come out in their own time.
Oh God I'm so excited!