I agree, ring the 0800 number.
Once you are living together that is.
I hope it works out for you, don't take any shit from your ex, give him high standards he must keep to right from the word go, or he will slip into whatever old habits he had.

Also, only get back together if you are really quite sure about it, as it is a huge change. and if you do move back together, make sure you have an exit strategy / back up plan, so you don't feel forever stuck with him, if things don't work out.
just my opinion.....