How do i get info about a flight 5 years ago?

TIGs

I am in the process of applying for compensation from jet2 through the resolver claim site for a large flight delay 5 years ago.

I am at the point in the claim where Jet2 are asking to be sent certain correspondence including my booking reference and a copy of my booking confirmation or boarding pass. I do not have either of these as it was so long ago now.

Can anyone advise me on how I can get these or another way around needing these.

Thank You :j

Caz3121

Jet2 thread is directly below this, if you read on there you should be able to see how others have addressed this. It may be you need to pay Jet2 for a SAR