I hope to be able to assist you.
Please could you confirm that your spouse has been issued with leave to remain for the UK?
Thank you in advance.
Therefore your wife does not need another visa to visit Belfast with you and can do so on the basis of her leave to remain.
I hope this answers your question.
will she need a visa if we go to the Rep Of Ireland ?
Although there is a limited visa waiver programme for holders of a UK visa, it does not apply to citizens of Mauritius nor does it apply to holders of LTR:http://www.inis.gov.ie/en/INIS/Pages/WP11000005
She will need to apply for her Irish visa at the embassy in London:http://www.embassyofireland.co.uk/home/index.aspx?id=33706
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