OK Guys,
Many thanks for all the comments and suggestions it is appreciated.
I have decided that as I dont want to risk the wrath of VM and as I dont use wireless I am going to risk using the SH in Modem Mode and see what happens
I will send the VMG300 back as requested, and hopefully it may go to someone else that requests one from Virgin
Initial tests of the SH seem OK, with Pings/Speed/Jitter in line with what I was getting from the VMG300 (Luckily I live in an Old Foggey infested area so never have any congestion issues

)
Will let you know how it goes!!