Think I am now on my second "Official warning " letter and that they have opened an investigation

Whats interesting is i think they may be using up old stationary as the various letters are not consistant. Some just referring to watching a television and others listing televisions colour or black and white (can you still get B+W TVs?) computers, mobile phones, game consoles,digi box or dvd/vhs recorder or anything else? to watch TV (as its being televised) YOU NEED A LICENCE!
Non response to their "Official Warning " letter will result in their Enforcement Division scheduling a visit. Now this is the laughable thing--they have to catch you watching television on one of the above devices and even then its only a "could be prosecuted" As if you are going to invite them in to watch you watching TV. A simple notice on my door saying if you are from the TV licensing Enforcement Division Please leave my property otherwise you will be committing trespass should be adequate
Thankfully there is no legal obligation for me to respond to any of their letters so this one will just be ignored- helps keep our posties in a job- but sorry guys if they put the cost onto your next licence.