Just today I received from a good friend in the UK two CTC patches one of which I have already sewn onto my cycle jacket. For those who do not know what the CTC is here is a brief history of the club from wikipedia
CTC is the United Kingdom's largest cycling membership organisation. It also has members and district associations in the Republic of Ireland. It was established in 1878, originally as the 'Bicycle Touring Club', making it the oldest national tourism organisation of any description in the World, and was renamed the Cyclists' Touring Club in 1883. Since January 2007, CTC's president has been the newsreader and journalist, Jon Snow.
Members, like those of other clubs, often rode in uniform. CTC appointed an official tailor. The uniform was a dark green Devonshire serge jacket, knickerbockers and a "Stanley helmet with a small peak". The colour changed to grey when green proved impractical because it showed the dirt. Groups often rode with a bugler at their head to sound changes of direction or to bring the group to a halt. Confusion could be caused when groups met and mistook each other's signals.
In earlier times, the Cyclists' Touring Club gave seals of approval, in the form of a cast metal plaque showing the winged-wheel symbol of CTC, for mounting on an outside wall of hotels and restaurants which offered good accommodation and service to cyclists. A few of the metal plaques still exist, as do a handful of road signs put up by CTC to warn cyclists of steep hills: usually steep going down, which was as much a problem for riders of large-wheel ordinaries, or "penny-farthings", as going up. Nowadays, CTC no longer puts up general road signs—although the right to do so is retained—and approved establishments are offered a plastic window-sticker carrying the blue and yellow logo shown above.
In 1898 CTC became embroiled in a court case to defend a member denied what she thought adequate service at a hotel carrying the club's badge.
The above CTC patches are available online at the CTC shop