Moving overseas - implications for UK Ltd company business taxes

Hi, please can you direct me to the right HMRC helpline to speak to a person about moving overseas (EU - country with a dual taxation treaty) but keeping a UK Ltd company operational. Specifically, with regard to corporation tax and VAT liability - which may be claimed by both countries. Please do not direct me to HMRC guidance on moving overseas as I have read it, but now need to speak to a person. Thank you.

Hi EB123,
For general advice please call the CT Services Helpline on 0300 200 3410.
Thank you.