Further to my letter to the North Swindon Practice at Home Ground Surgery, Thames Avenue, Swindon, SN25 1QQ, I got this letter back from Chris:

What she doesnt say in this is that 01793 705 783 maps to 08444 996 631 directly and places you in the Que. I will have to have a think about how to respond to the letter; but I feel I may have to forward copies of all correspondence to my MP as well;