Watt, who turns 25 on Thursday, put pen-to-paper on Sunday afternoon. Subject to ratification from the relevant authorities, he will be available to make his Pilgrims’ debut against Harrogate Town on Tuesday evening.

The former Lincoln City trainee, who left Sincil Bank in 2008, has played predominantly for the Gingerbreads since — plus a productive spell under Graham Drury’s management at Corby Town.

Watt won the Southern League with Corby in 2009 and Evo-Stik Division One South with Grantham in 2012.

To listen to Drury’s thoughts on Watt’s arrival, watch the manager’s video interview following Saturday’s 1-1 draw at Workington.

Boston United would like to thank their Grantham Town counterparts for their assistance in making the move proceed smoothly.