The club will be discussing compensation with the Cobblers and has assured supporters that if their valuation of the youngster is not met, they will go to a tribunal.
The website have also reported that although the news will come as a big disappointment to supporters, Terry Brown is currently looking at another Johnson-style player who he has spotted and is looking to sign.
Although many supporters had wished that Johnson would stick around for another season, he is a great talent who will do very well in the League and we wish him the best in his career.