Allen, who appeared for Lancashire in the competition last year and is currently at the IPL with Royal Challengers Bangalore, will come in to the Yorkshire set-up after the departure of Pakistan seamer Haris Rauf, who is available for the first five games of the Blast.

"I'm really looking forward to returning to county cricket for the upcoming Blast," Allen said. "I really enjoyed my first foray into the competition last season and am hungry to contribute to a successful campaign for Yorkshire.

"As luck would have it, I am currently spending a fair bit of time at RCB with David Willey, so it's great to be able to establish that relationship prior to arriving."

Allen, 22, made 399 runs at a strike rate of 159.60 in last season's Blast, helping Lancashire to reach the quarter-finals of the competition, before going on to feature for Birmingham Phoenix in the Hundred.

He joins Rauf and Pakistan allrounder Shadab Khan as Yorkshire's T20 overseas signings for 2022.

Darren Gough, Yorkshire's interim managing director of cricket, said: "We have brought in Finn Allen who is an explosive batsman and very good young player. Finn will come here to replace Haris Rauf who we have for the Championship games early season and the first five Blast matches.

"Our signings to date will give us some excellent options in the Blast and I am thrilled to be able to add these talented players an already exciting squad."