Premier League transfer window summer 2015: Every single signing and club transfer spend in one graph

Who is the most expensive signing of the summer transfer window? When were clubs busiest in the market? And which club has spent the most money?

Click through our interactive graph above which displays every transfer so far this summer for the answers to all your queries.

Raheem Sterling is the most expensive signing so far this summer

Last summer the Premier League managed to splurge just short of a £1bn on transfers - a record £835m - almost double the sum spent by La Liga. It's already over half way to that total having spent more than £500m.

With a £5bn broadcasting deal forthcoming, clubs appear to be more inspired than ever to splash out on securing their position in England's elite. Already the record for an English player has been broken thanks to Manchester City's £49m acquisition of Raheem Sterling.

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