Even if you can't get Infinity via the commercial roll-out the BDUK project should help, viz :-
West Sussex County Council has signed a £20m deal with BT. Fibre broadband will be rolled out to about 98% of West Sussex homes and businesses by the start of spring 2016.
BT is contributing £7.6m towards the overall cost of deployment while West Sussex County Council is contributing £6.26m. £6.26m is also coming from the Government’s Broadband Delivery UK (BDUK) funds.
For further information, visit the West Sussex County Council website.