John,
I think you'd need to exercise a bit of care here - and read the USB stick product technical information quite carefully.
Each country decided on it's own implementation of analogue transmission standards - aside from the French deciding to use SECAM, the rest of Europe uses PAL.
The bad news is that the UK and Ireland use PAL-I, Western Europe uses PAL-B or -G, and Eastern Europe uses PAL-D or -K; and that's right, they're all different - but not that different. The carrier offset is usually either 7MHz or 8MHz but that's enough for picture and no sound or sound and no picture.
So if you want analogue TV - you might need to do a bit of research and make sure the USB stick is "multi-standard" - and supports all the PAL standards (and SECAM if you go through France)
Happily DVB should be a different story - there is a 2004 European standard that has standardised DVB transmission standards - but check the USB stick technical data again...
Robert