Dose UK tv work in US?

There are several differences between UK and US televisions:

First, UK power supply is 230V and North America is 115V. Although some UK televisions will operate on 90-260V, not all of them do and it may require a transformer or other power adaptor to even power up.

Standard definition video signals use different color encoding. Again, some modern UK televisions will decode NTSC color (the North American color system) but not all of them.

HD signals do not use the same color encoding as as SD but the frame rates are 60Hz in the US, 50Hz in the UK. Some but not all televisions handle both frequencies for SD and HD.

Tuners are not compatible. A set top box will overcome this one and they can be purchased for as little as $30 for SD terrestrial receivers (Similar to the UK Freeview set top boxes). Cable and satellite receivers will also overcome the tuner problem but with the issues mentioned above, you may still not get a working system.

The cost of televisions in the US is considerably lower than the UK. By the time you have invested in Transformers, color transcoders and external tuners, you are very close to buying a new HD television in America. Even better, you don't have the investment in time trying to figure out what you will need to buy and how to hook it up. And rather than paying to ship a British television across the Atlantic, you get to sell it and get more money towards a brand new American model.