TFL has obviously been aware of his use for 15 years, as the website was widely publicised in 2010. They have not taken any action to defend any trademarks they think he violates in all that time. IANAL, but I would have thought that if he wanted, he probably has a good case to invalidate those trademarks on the grounds that by not defending them for so long, they have become generic. But in the end, it's probably not a good use of his time and money to fight them on this.