Tim,
You could purchase a dual system TV (PAL/NTSC). Try this company in New York; www.220voltappliances.com , or www.eastwestintl.com in Houston. They sell a range of brand name TVs designed to operate at 110/220V with PAL or NTSC signals. You then have the option of taking the TV with you if you go back to the UK at some time in the future.