So VM retentions just called me back this morning, initially offered me the same Ultimate Volt bundle for £55pm, after the original guy when I rang to cancel offered it at £70pm. Then after a quick "nah I'm ok" offered an additional £7 manager discount, so got it for £48pm.
The only caveat to why it was so cheap is because I'm an O2 customer, apparently that equates to around a £25pm discount she said on her system. The O2 SIM I got late last year purely to get the free Gig1 upgrade lol - just £8pm with 30Gb data I chucked in my iPad.
So effectively paying £54pm now for the Ultimate Volt bundle with O2 SIM, I'm happy and call that a win
(meanwhile my brother in law shudders as he just renewed with VM a month ago and took the first offer of £99pm, told him to play the game but he couldn't be bothered lol)