Morgan and Clarkson
Piers Morgan has taken a swipe at Jeremy Clarkson and his former Top Gear presenters Getty / Reuters

Piers Morgan has hit out at long-time foe Jeremy Clarkson and the former Top Gear line-up warning that they will "have to get used to not being big stars in this country any more". The former motoring-show hosts are filming an as-of-yet unnamed show to be aired on Amazon Prime in autumn this year.

Good Morning Britain host, Morgan, believes the programme will only be watched by "about 100,000 people," compared with the 8m viewers that once tuned in to see them on Top Gear on BBC Two.

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Amazon Prime is said to have around 2m subscribers in the UK compared to rivals Netflix's 5m. The show was reportedly touted to Netflix but the movie-streaming service deemed the costs too expensive.

Morgan told the Radio Times: "I never watched the old Top Gear, because my right temple still has the scar from where Clarkson walloped me (at the 2004 British Press Awards) and whenever he comes on screen, my temple twitches.

"But out of pure curiosity, I probably will tune in. It's only going to be watched by about 100,000 people, so they'll have to get used to not being big stars in this country any more."

The former Daily Mirror editor, now a television presenter on Good Morning Britain, and Clarkson have had a long-running feud from when Morgan was working at the Mirror. Clarkson was famously suspended in March 20115 before being fired by the BBC after a so-called "fracas" that saw him punching producer Oisin Tymon, and forced to settle a £100,000 ($139,000) racial discrimination and personal injury claim.

The new show is rumoured to have a £160m ($235m) budget but is as yet unnamed and several possible titles have already been trademarked. Clarkson said in his Sunday Times column: "Every morning I'd make a £7,000 ($10,000) call to the lawyer with an idea, and every afternoon I'd get a £7,000 reply saying the name was already in use by someone in New Zealand or France or Ukraine. Prime Torque. Autonation. Skid Mark. Everything was a no-no."

The new Top Gear presenter will be Chris Evans with fellow hosts named as Matt LeBlanc, Rory Reid, Sabine Schmitz, Chris Harris and Eddie Jordan. The new series begins in May.