Coulson, 26, spent the second half of last season on loan with the Tangerines and scored twice in 17 League One appearances.

“After enjoying my time here so much last season, I knew this was where I wanted to come back to on a permanent basis," he told the club website., external

Ashworth, 21, is a Wales Under-21s international and the son of sporting director Dan Ashworth.

He had a loan spell in the third tier with Bolton Wanderers last season and scored two goals in 16 league appearances.

“Blackpool is a massive club and this is a great opportunity for a fresh start," he told the club website.