[mythtvnz] RG6 cable and mains power cable fed through same junction box - interference likely?

[Matt Poff]

I'm thinking of feeding some RG6 cable (just standard stuff - not ultra 
shielded)  up into a  existing 1970s side-by-side two socket flush box 
(replacing the old 1970's face plate with two vertical PDL face plates 
side-by-side, one with the two power sockets, the other with coax TV/FM 
and RG6 connectors).

Anyone know if I'm likely to have  any problems with interference 
locating the signal cables this close to mains power cables? The comms 
cables come through the floor and the power cable comes from above so 
they are only in close proximity in the flush box.