Thanks for that, it was low wing and not Q400.
We get many ATRs (finnair operate them) and a few AN26s (one regular one that has very unsynched props) and it wasn't those.
What piqued my interest was that, initially, I thought it was a 748 (having many hours on type) but I don't think it was dart driven.
Discarded a Gulfstream 1 for same reason.
Are then any 748s or G1s still flying in europe?
All I could think of was a Saab, it looked to big for a Jetstream.