Blackburn Rovers will be due an add-on fee from Luton Town if Thomas Kaminski makes his Belgium debut at the European Championships, The Lancashire Telegraph understands.

The 31-year-old was sold to the Hatters last season after they were promoted to the Premier League. The deal was believed to be around £2.5million, with some bonuses included.

It's understood that within that was an international clause which will be triggered by Kaminski making his competitive debut. Rovers also have a 'significant' fee due when Adam Wharton makes his first competitive England start.

Rovers' 2019-20 Player of the Season did that earlier this year but that was in a friendly. All international clauses are activated when a player features in a competitive match.

READ MORE: Wharton on Rovers, upbringing and England rise

Kaminski could reach that landmark at the Euros though after being selected in the squad by Domenico Tedesco. At the time of writing, he is expected to be number two behind Matz Sels with Koen Casteels also competing for the gloves. Thibaut Courtois was not selected after a public fall-out with the manager previously.

Luton's relegation means Kaminski will return to Ewood Park next season, where he will surely get a warm reception. He won their Players' Player of the Season despite dropping down and has impressed his team-mates.

“He’s absolutely brilliant and you see it in training every single day," understudy James Shea told Luton Today.

"He’s quick around the goal, he’s technically very good, everything about him, he’s a really good all-round goalkeeper. I didn't realise how good he was until he came this year. 

"I knew he was at Blackburn, I knew he was a good goalkeeper, don't get me wrong, but I didn't realise how good until you see him every single day and you see him in the games.

“He had a couple of little injuries (at Rovers), but that's part and parcel of football. He's come to us and after the first few games he was unbelievable, unbelievable. Some of the saves he’s made, you think how on earth has he saved that? And he did keep us in games a lot of the time. 

"It’s thoroughly deserved all the awards he won at the end of the season. He’s been unbelievable, there’s no other word to describe him, he’s been absolutely unbelievable.”