Bird & Bird and K&L Gates have won the leading advisory roles on Arsenal's lucrative kit provider deal with Puma.

The Premier League leaders have signed the a new five-year deal with the German company, which will replace Nike as club's kit provider, bringing to an end a 20-year relationship.

Puma will produce Arsenal's playing and training kit from 1 July. Both parties have said the partnership represents the biggest deal in both Puma's and Arsenal's history.

The company did not disclose financial details, but the deal is reportedly worth more than £30m a year.

Bird & Bird advised Arsenal on the transaction. K&L Gates' City office acted for Puma with a team comprising technology media and telecommunications partner Warren Phelops and senior associate Andrew Danson.

Puma and Arsenal plan to work together on a global strategy to achieve growth through Puma's sales network, international tours and integrated marketing activities.

Arsenal chief executive officer Ivan Gazidis said of the deal: "This represents another important step forward in Arsenal's progression on and off the pitch."

Puma also supplies kit to Newcastle United and Rangers FC as well as national teams such as Italy. The move has left Nike with the Manchester clubs, City and United, as its only Premier League clients.

Firms with longstanding relationships with Arsenal include Slaughter and May, which was mandated on last summer's club record signing of Real Madrid midfielder Mesut Ozil.

Other law firms involved in last summer's football transfer activity include Charles Russell, which advised on French midfielder Mathieu Flamini's return to Arsenal after five years in Italy with AC Milan.