BSkyB and TalkTalk Telecom have fallen back after BT unveiled more details of its proposed sports package.
Having paid £1bn for sports rights, BT has announced it will offer its new channels carrying live Premier League football free to its existing broadband customers.
They will also be free to customers who subscribe to BT broadband, but will cost £15 a month to anyone without BT, such as Sky customers. The aggressive move steps up the competition in the broadband market, helping to push BSkyB 46.5p lower to 815.5p and TalkTalk down 15.4p to 237.1p. BT is 4.3p lower at 278p.