At only 50 hertz, the LT-40C750 has a quite slow high frequency rate compared to most of the other medium display diagonal TVs that were released around the same time as this television. The average high frequency rate of medium display diagonal TVs that have been available for around the same time as this television is 200Hz.
Alternative 50Hz refresh rate TVs currently available that you might want to look at include the LG 42LB5610 (£332.79), or the Samsung UE40EH5000 (£249) which both of have better reviews.
If this television high frequency rate is too slow for you then you might want to look at the LTDN50K220 (£365) (100Hz and higher rated), or the LTDN40D36 (£249) (100Hz and higher rated) both from Hisense or the Samsung UE40H6400 (£249.99) (400Hz and higher rated).
What does "high frequency rate" mean?