Panasonic TUCT20 Freeview Boxes have 4:3 conversion error
 

I would like to warn prospective purchasers of this box that
widescreen transmissions, which they mostly are these days, viewed on
the 4:3 option, result in slightly wide faces and about an inch
missing beyond the sides of the screen. The picture and sound are
otherwise good, and most people are oblivious to the defect.

Dave Williams