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A spokesperson for the British PM said the quickest it would take to train somebody to fly a British fighter is 35 months.

I cheeked my own nations time frame on the Defencejobs website.

https://www.defencejobs.gov.au/jobs/air-force/fast-jet-pilot

> Pilot Basic Course (24 weeks)
> Pilot Intermediate Course (36 weeks)

> Introductory Fighter Course – type conversion and advanced flying training (6 months).
> Introductory Fighter Course – tactical flying training (6 months).

And then after that you do additional training on the Aircraft you are assigned to.

> F-35A Lightning II (No. 2 Operational Conversion Unit). The 6-month OPCON for Lightning II is conducted at RAAF Base Williamtown (just outside of Newcastle).
> F/A-18F Super Hornet (No. 82 Wing Training Flight). The 6-month OPCON for Super Hornet is conducted at RAAF Base Amberley (just outside of Brisbane).
> EA-18G Growler (No. 6 Squadron). Growler OPCON training takes 11 months and is conducted in Washington State, USA by the US Navy, with bridging training on return to Australia conducted at RAAF Base Amberley (just outside of Brisbane).

So about two and a half years, so similar. Maybe they could train a pilot in 6 months if he was already a fighter pilot, then he would just need do the OPCON for the plane itself.
However I don't know if they would let you fly combat ops after that, it does say 'Once you complete your OPCON, you will be a fully qualified FJP ready to contribute to the application of air power and the defence of Australia.' but I don't know how literal that is, you would think there would be more on the job training.