I am trying to track my various pensions and would like some advice. My contributions from September 1999 to April 2001 have gone missing.

I'd worked at my old employer from 1997 to 2001 and paid pension contributions throughout.

My employer changed its pension provider in mid-1999, but the new scheme says it has no records of me.

And it is hard to sort things out now because my old employer does not have employment records from that period.

HMRC has provided contracted out history that shows I was enrolled in the original scheme beyond 1999.