The Philips 50PFH4009 has one of the slower high frequency rates (only 60 hertz) amongst medium display diagonal TVs of this age. The average high frequency rate of medium display diagonal TVs that were released around the same time as this TV is 220Hz, and the high frequency rates range from 50Hz to 1,600Hz.
Alternative 60Hz refresh rate televisions currently available which you might want to consider include the Philips 42PFT6309 (£349.99) which has better reviews.
If this television high frequency rate is not fast enough for you then you might want to look at the Sony KDL-40W705 (£369) (200Hz and higher rated); or the Hisense LTDN50K220 (£365) (100Hz and cheaper), or the Philips 40PFH5300 (200Hz and cheaper).
What does "high frequency rate" mean?