Strange sounding jet

[Vulture 01]

Walking along the seafront at Gorleston around 1345 I saw a jet coasting in, heading west. It caught my attention for two reasons.
First it was very hard to see it - all I could make out was a vague grey shape.
Second it was making a very strange grinding/grumbling noise. This then stopped as soon as the jet was slightly inland. This was when I lost sight of it.

Anyone else seen/heard it and can confirm what it was.

BTW I don't claim it was an Aurora or any one of those exotic things. Probably just an F15 with indigestion......

[Fastwalker]

Although unlikley an F22 ,was it similar to this? F35's Are very 'Throaty' in my opinion.
https://www.youtube.com/watch?v=wv7F691TL0U

[Wobs58]

vulture

I can confirm hearing unidentified jet noise as I was strolling along the beach at…. Gorleston. However, I did not see them but considered the sound to be at least a pair of jets.

[C24]

I was in and around Wittering area late this morning and heard something similar. Nothing seen, and nothing over the airfield

the F22 video did not have the crackling, rumbling that i heard