The 48L1433 has a fairly slow high frequency rate (only 50 hertz) compared to most of the other medium display diagonal TVs that have been available for a comparable time to this television. The high frequency rates of TVs of this spec and age range from 50Hz to 1,600Hz, and the average high frequency rate is 220Hz.
There are a number of alternative 50Hz refresh rate televisions currently available that you might want to consider including because of their better review scores, the UE46EH5000W, or the UE40C5100 both from Samsung or the Toshiba 40L1333.
If this Toshiba TV high frequency rate is too slow for you then you might want to consider the 50PFH4009 (£455.39) (60Hz and higher rated), or the 40PFT4009 (60Hz and higher rated) both from Philips or the LG 49LF5400 (60Hz and higher rated).
What does "high frequency rate" mean?