After reading the information on the ukvisas.gov.uk web site... I think the OP had better check that he will be able to work in the UK if he enters the country on his wife's ancestral visa.
The web site says:
Can my family join me in the UK?
Your husband, wife, civil partner or eligible partner and children under 18 years of age can join you in the UK if:
* they have a visa for this purpose, and
* you can support them without needing any help from public funds.
It says that the main applicant has to be able to support their family.
It doesn't say, anywhere, that family members are allowed to work to support themselves.
Maybe I'm missing something... but I think the OP definitely wants to double-check on his eligibility to work.