Recently Wifi to Sony devices Stuttering Video

Hi, sorry I could not find a post specific to my issue.

I have two Sony tv's a KDL-22EX320, KDL-32EX503 and a PS3, all been using serviio flawlessly for a long time (still using version 0.6.2) with Wifi and Ethernet.

PS3 (Playstation 3) - on Wifi
KDL-22EX320 (Sony Bravia TV 2010) - on Wifi
KDL-32EX503 (Sont Bravia TV 2010) - on Ethernet
PC Win7 64bit (Serviio) - on Ethernet

Recently both the PS3 and the KDL-22EX320 are refusing to stream video over Wifi without constantly stuttering. Avi's, Mp4's and Mkv's over Wifi was never a problem but now out of the blue Wifi has become an issue and I have no idea why, I can't understand why the Wifi bandwidth would all of a sudden become a problem.

So far:
Hard Reset on the router.
Reset the network settings for both Wifi devices.
Tested all devices on Ethernet and video streams fine.
No change to Router settings or connection (Virgin Media 50MB).
No change to PC other than normal restarts which obviously restarts Serviio.
Both Wifi devices currently stream Netflix, Youtube HD without issue.

Any other suggestions would be appreciated - thanks

[DenyAll]

Its got to be something with the WiFi environment. Try changing channels on your WiFi - perhaps more neighbors are using WiFi in your area interfering with your signal You can download a WiFi Scanner and see what's being used in your area, then pick a channel not in use (try to stay with either channel 1, 6 or 11).