Reputable Horse Dealers? Cambs/Lincs/Norfolk UK

Hi, due to financial problems I am having to downsize on our horses, and therefore have two ponies which need to go as soon as possible, really. They have been advertised since July, but nothing is happening.
So I am now, sadly, looking for a reputable dealer that I can trust as much as possible to find them a good home.
I know a lot of dealers aren't very trustworthy, and I am not going to let them go to anyone, which is why I though perhaps some of you might have had some sort of an experience with a dealer who stuck out as being genuine and kind.

Thanks
Lottii