Scottish Professional Football League chiefs have started talks to try and secure the game's biggest-ever television deal.

Representatives from a host of Premiership clubs , together with SPFL chief executive Neil Doncaster and chairman Ralph Topping, are in London on Thursday to meet with BT Sport.

Current broadcast deals with BT and Sky Sports are set to expire at the end of the 2019/2020 season.

The existing agreements with the subscription broadcasters, signed two years ago, are worth £82m over the final four seasons of the contract.

"I am down in London [on Thursday] with all the chairmen and Ralph and Neil to discuss with BT the next deal," Hamilton Academical chairman Les Gray told BBC's Sportsound show.

"We are going to meet Sky Sports soon for similar talks. There is a real positive feeling just now about getting the best deal we have ever had.

"Hopefully we can come out with a deal that gives us real true value for the first time in a long, long time."

The previous TV deal signed in 2012 was worth £80m over five years but it was renegotiated after the demise of Rangers.

A record £125m contract over a four-year period with Setanta Sports was signed in 2008, but the broadcaster's UK arm collapsed a year later.

An SPFL spokesman told STV: "We are fully focused on working together to help secure the very best live broadcast deal from 2020 for the benefit of SPFL clubs and supporters and have an open mind to the possibilities which exist to achieve that."