I use lendons as it is just up the road from me, as he does spares etc, which Lord and butler dont, and i tend to not go to lord and butler any more due to the following reasons
1- I have to drive right across cardiff to go there pain in the backside on a saturday fuel cost etc, only time I need to go across cardiff if im in work at cbyc or with sea cadets
2 - Dont have what I want -they dont do spares, and sometimes their s/h range needs lot to be desired.
3- I've found in the past that their S/H locos need full strip downs and overhauling,
so I dont use them anymore, but rob at lendons is always very helpful with me, and he also does loco remags as well, plus he does ringfield etc spares so I will give him definate thumbs up :D, and he's local so a bonus, he is starting up a second hand range so will keep a keen eye out on his site.
edit i'm longer welcome at l&b due to my comments, i'm entitled to my own opinion and said it as a customer.