Picked 10 bottles of this up for my Grandmother last night at the store in Bracknell. Tesco have the entire range of Martini (Extra Dry, Rosato, Bianco, Rosso) 1 litre bottles on offer at 2 for £10. As they're normally £7.99 each, this is a pretty good saving.
It gets better though, as this seems to qualify for Tesco's wine club deal as well. It was closing time at the store, so I wasn't able to check exactly what this is, but I think it's 10% off 8 bottles? Basically I got £4 off my spend on top of the normal discount - taking it down to £46. Assuming it is that, this means you can get the bottles of Martini for nearly half price.
at tescos instore