因為諗住帶埋條女去英國 - you two will need to meet the requirements set out in the UK's immigration rules in order for her to stay in the UK.
You will need to be in the home forces and exempt from UK's immigration rules under section 8(4) of the Immigration Act 1971. She will need to be your wife or unmarried partner. For unmarried partner, there is also an additional requirement of you two lived together in the same address for at lease two years before the application.
See 276AD to 276AF
https://www.gov.uk/guidance/immigration-rules/immigration-rules-part-7-other-categories#pt7hmforces