This is to share an offer from Sky Broadband (Fibre Optic) when I casually mentioned I was considering moving to Virgin. I have been a Sky customer for several years, so I am assuming this is what their retention department is currently authorised to offer, if pushed:
** Reduction of Fibre Optic broadband from £20 to £5 for the first 12 months of their 18 month contract.
** Immediate account credit of £100 (2 x £50)
This takes the cost of a brand new Fibre Optic contract down to £4.44 a month, for 18 months. The installation and SR102 Sky Hub are both free (aside from a £6.95 Hub delivery charge).
This is the best deal I've come across, beating cashback sites and anything Sky have previously offered.