UK Establishment of a foreign company

We are a UK Establishment(not a subsidiary) of a foreign company. The person in charge of the establishment is based in UK. However, his UK visa expires next year. Could he still be a person in charge from overseas? or does he have to be a UK resident? (in terms of account reporting, companies house registration, UK sponsor listenership, etc) Thank you.

Hi,
Information on how to apply for an agent services account if you're not based in the UK can be found here:
Apply for an agent services account if you're not based in the UK
Thank you.