What's wrong with just using Holdcroft as long as the price is right. They go out of their way to try and help TA members, and you will always get a proper Honda VAT parts invoice to back up your service records. And they won't send you the wrong oil filters either!
Brett is right I called Holdcroft and got a price for the service kit I then mentioned Howards Honda and their price on e bay. They matched the price and sent them free post. I should point out that this is somethin I did of my own back as a TA member and should not be bounded about, nor do I think we should be phoning HH every time we want something and quoting prices willy nilly to get their price down.
I called HH to get a price and I wanted to give them custom anyway I asked if they would price match, which they were happy to do. It's important that we support them and not take the p1ss.