The highest contrast ratio of the LG 24MB65 is 50000000:1. That's over two times the contrast ratio of the most common dynamic contrast ratio of 20000000:1. The contrast ratio of all flatpanel monitors of this age and spec ranges from Mega Contrast to 100000000:1.
It may also be worth considering one of the other PC displays that have a 50000000:1 dynamic contrast ratio currently available including because of it's better review score, the Viewsonic VX2363 (£126.70), the AOC P2460 (£129.99), or the Asus PB238 (£169.77).
If the contrast ratio of this medium monitor is too low for you then you might also want to consider the VG248QE (£185.99) (80000000:1 and higher rated), the VX238 (£134.53) (80000000:1 and higher rated), or the MX239H (£166.37) (80000000:1 and higher rated) all from Asus.