“I am really pleased to get the opportunity to come to Trent Bridge earlier than expected, and I am really looking forward to the Vitality Blast,” Ali said. “I was already really excited about the chance to come and play in England, so when I was told there was a chance to come earlier, I said yes straight away.

“I have heard a lot about how good Trent Bridge is to play at, and I can’t wait to meet the team and play in front of the brilliant fans. I think we have a really good squad this year and I am excited to play with them and hopefully go really far in this competition.”

Notts were forced into a last-minute rethink of their Blast plans by the news last month that Siddle would not be allowed to play for them after taking part in “disapproved cricket” – namely the World Legends Pro T20 League in Goa earlier this year.

Peter Moores, Nottinghamshire’s head coach, said: “It’s great news that we’ve been able to secure the services of Mohammad a bit earlier than planned. When it became clear last month that we’d have to find another overseas player for this year’s Vitality Blast, Mohammad was the obvious choice.

“With his recent performances in the PSL, I’m really excited by what he can bring to our group, and Paul Franks has always spoken highly about his ability as well as his character. He’ll add a lot of experience and quality to our group, which is what we want from our overseas players, as we look to hit our targets in the Blast this year.”