League One Peterborough United have signed Watford striker Britt Assombalonga for a club record fee.
The precise value of the transfer is undisclosed, but the 20-year-old has signed a four-year deal.
He scored 16 goals in 49 games while on loan at Southend last term and netted five in five for Conference Premier Braintree the season before.
Watford have first refusal on buying back the forward, should another club have an offer accepted.
Posh chairman Darragh MacAnthony said on Twitter the club had "smashed" their current transfer record fee - £1.1m for Tyrone Barnett.
Manager Darren Ferguson has been searching for a striker since last season's joint top scorer Dwight Gayle left for Crystal Palace this summer.
"We always wanted somebody in and frankly the chairman has backed me on this one," Ferguson told BBC Radio Cambridgeshire.
"We've still got another one we'd maybe like to bring in as well. We haven't finished there.
"We'd maybe have to balance the books and one or two go out but we were aware of that anyway."