I am planning to go to China for business trip with my boss on 12/12/2015 and back on 19/12/2015, the day might be changed but should be 7 days and before Christmas. I just checked my visa is Tier 5 youth mobility visa and will expire on 5/3/2016, I hear people mention if I return to UK later, I need to have 3 month or 6 month valid visa. Because I have been rejected to enter the UK before (but I was under a special case and accident, so UKGOV accept my reason and approve my visa application after that) so I am worried about any problem for me to return UK after that. Does anyone know the policy and can support a link on gov website that mentions similar requirement or mention my case is alright to return?
According the the Tier 5 (Youth Mobility Scheme) page:
How long you can stay
You’ll be given a visa to live and work in the UK for up to 24 months.
You can enter the UK at any time while your visa is valid, and leave and come back at any time during your stay.
If you turn 31 while you’re in the UK, you can stay for as long as your visa is valid.