Help to identify plane?

[Gerard M]

Hi all, might be a fruitless questions here, but about 10minutes ago, a relatively high up plane flew over my house and banked to turn to the west and then headed south-west. I'm in the Hills district (Sydney's north west) and dont normally get highflyers coming from the north and heading south, its contrail is still mostly there now if anyones interested and PP didnt have anything there?

Does anyone know what it would have been?

Cheers
Gerard