I noticed this deal, amongst others, currently advertised on Virgin Media's web site:
-->>
£10.00 a month for the first 6 months - £20 a month after that <<--
I was rather upset at this offer as I was paying a hell of a lot more for the same service as a loyal customer.
I phoned the number shown under 'Got questions' and spoke to an adviser and complained rigorously about this offer and wanted to take advantage of it. I was told I couldn't as I wasn't a new customer.
I told him if Virgin Media didn't have the monopoly on cable in my area and in fact the UK, I would give my notice to leave them.
He quickly told me that Virgin Media were working on a revised package for existing customers to match the offer(s) in the link I have shown, but I won't hold my breath.
I urge everyone who has Virgin Media and is paying higher rates than those on offer to complain to try make a difference.