Only discovered this today but due to the fact that Virgin Media and O2 have merged you can get a nice upgrade on both sides of the coin for FREE (it's not a new contract)
O2 Side
If you already have or are signing up to Virgin Media broadband and an eligible O2 Pay Monthly plan, then you can get double the data on every eligible O2 Pay Monthly plan in your name, in your household. Please note that if you already have unlimited data on your O2 plan, the benefit cannot be applied.
Before Supercharged with Volt
5Gb > 10Gb
10Gb > 20Gb
50Gb > 100Gb
100Gb > 200Gb
250Gb+ > Unlimited
Virgin Media Side
If you already have or are signing up to Virgin Media broadband and an eligible O2 Pay Monthly plan, then you can get a broadband speed boost up to the next available level (if you aren’t already on the fastest speeds you can get in your area at the point you place your order to become supercharged with Volt). Please note that if you already have Gig1 broadband or you are already receiving the fastest speeds you can get in your area, then the benefit cannot be applied.
Before Supercharged with Volt
50Mbps fibre broadband > 100Mbps fibre broadband
100Mbps fibre broadband > 200Mbps fibre broadband
200Mbps fibre broadband > 350Mbps fibre broadband
350Mbps fibre broadband > 500Mbps fibre broadband
500Mbps fibre broadband > Gig1 fibre broadband
You can activate the promotion here - https://www.o2.co.uk/virgin-media-o2
O2 Side
If you already have or are signing up to Virgin Media broadband and an eligible O2 Pay Monthly plan, then you can get double the data on every eligible O2 Pay Monthly plan in your name, in your household. Please note that if you already have unlimited data on your O2 plan, the benefit cannot be applied.
Before Supercharged with Volt
5Gb > 10Gb
10Gb > 20Gb
50Gb > 100Gb
100Gb > 200Gb
250Gb+ > Unlimited
Virgin Media Side
If you already have or are signing up to Virgin Media broadband and an eligible O2 Pay Monthly plan, then you can get a broadband speed boost up to the next available level (if you aren’t already on the fastest speeds you can get in your area at the point you place your order to become supercharged with Volt). Please note that if you already have Gig1 broadband or you are already receiving the fastest speeds you can get in your area, then the benefit cannot be applied.
Before Supercharged with Volt
50Mbps fibre broadband > 100Mbps fibre broadband
100Mbps fibre broadband > 200Mbps fibre broadband
200Mbps fibre broadband > 350Mbps fibre broadband
350Mbps fibre broadband > 500Mbps fibre broadband
500Mbps fibre broadband > Gig1 fibre broadband
You can activate the promotion here - https://www.o2.co.uk/virgin-media-o2