By Jonathan Davies

Premier League football clubs this summer spent more money on transfers than ever before, according to Deloitte.

Clubs spent a record £870 million on new signings, beating last year's record of £835m.

"This summer has seen another record level of transfer spending, as Premier League clubs continue to use increases in their revenue to invest in playing talent," said Alex Thorpe from the Sports Business Group at Deloitte.

"Total spending in 2015, across both the January and summer windows, is also a new record, reaching the £1bn mark for the first time."

Manchester City was by far the biggest spending club at around £160m - £55m on Belgian midfielder Kevin de Bruyne and £49m on Liverpool's Raheem Sterling among the club's biggest signings this summer.

But it was City's close rivals Manchester United that secured the biggest transfer on 'Deadline Day'. They spent a reported £36m on Monaco 19-year old Anthony Martial, making him the most expensive teenager in history.

The increased spending comes as a result of record TV deals and relaxed financial restrictions. Earlier this year, the rules of Financial Fair Play (FFP) - which was designed to make football clubs more sustainable by restricting losses - were relaxed, meaning financial powerhouses like Manchester City were able to spend, and spend big.