Dan, I posted photos of my Bromptons just a little while ago (in the non-Thorn related section), before reading the above. I did think about the competition aspect, but took the view that, as SJS very prominently sells the brand, which in no way competes in Thorn's space, it would not be an issue.
Very thoughtful of you, Sam.
I know Thorn are sensitive to protecting their brand designs and sales of bicycles they produce, and Andy Blance has removed some key frame dimensions to avoid aiding the competition in duplicating Thorn's geometry. He told me he came to this decision when he met a rider on a Thornlike bicycle who said (paraphrasing), "It's not a Thorn, but is the same".
Where Thorn kindly pay the bills to host this Forum for us as a peer-based support and sales tool, it would be unkind to feature competitors to the brand -- it is the Thorn Cycling Forum, after all -- and I don't want them to reconsider providing this space, which has grown into a close-knit community for some. Each day, I vet about 600 membership applications. Most are spam, but a few are registrations by competitors. I try my best to be fair to all while protecting Thorn's interests, because they have kindly provided this space.
As for Bromptons...they're not Thorns, but are a featured brand of SJS Cycles. Although they are restricted from selling them online, St. John's Street Cycles (Thorn's sister company) has a wide range of Bromptons available at their Bridgwater store -- and en entire range of parts and accessories available online from their "Brompton Shop", here:
http://www.sjscycles.co.uk/brompton-shopbrompton/?geoc=usYou've some lovely Bromptons, Sam, and I wish you all the best with them -- surely some of the nicest examples I've seen. I lusted after one myself many years ago, but couldn't afford one so I designed my own, nearly done if I can find the time to braze on three more cable stops and the front derailleur boss.
All the best,
Dan.