Limited visits to the UK post Tier 5?

Hi there

I am an Australian Citizen, currently on the Tier 5 Youth Mobility visa which ends in July. I will be leaving before the end of the visa and moving to France.

Is there a limit on travel back to the Uk after my visa has expired?
For example, how long I should wait before coming back?
Is there is a difference between being there for work (I will be employed in France but we have London offices) or leisure?
For how long each time I can come back?
Is there a limit of total days per year I can spend in the UK?

I don't have any plans yet to come back but given that colleagues and friends are here I want to know what my options are!

Thanks
Amelia

I would think that standard visitor visa rules apply https://www.gov.uk/standard-visitor-visa, apart that you do not need to apply for visa itself