Unbearable ping while playing anything online - L4D2 (UK)
Recently started playing l4D2 again on the PC after a while away. I'm not finding it almost impossible to play due to the lag and high ping. It's just me, none of my friends are experiencing anything like it.
I'm using an Ethernet connection to my router while having a constant 9+ MB/S download speed. Ping to local hosting servers are low. I realise that dedicated servers can be located in the US which could be the problem, but my friends, one of whom is using the same ISP as me, don't experience the problem. I'm the only one using the connection and my download game content is connected to the closest area to me.
Even in Local games, where my friends and I play games, who live within a 10 mile radius of me, my ping will exceed 150 (red bar). I will note that it ONLY happens with L4D and no other internet required games that I play.
Any help or insight to what can be causing it?