This has ABSOLUTELY nothing to do with Brexit - nothing. This woman (for perfectly respectable reasons, it appears) invalidated her residential permit by extended visits to Singapore and a more permanent permit has not been achieved (we don't know why,but it seems likely it has to do with the previous invalidation). She was, however allowed a visitor's permit which ran out THREE YEARS AGO. She has been living here illegally ever since. So, instead of permits, why didn't she seek citizenship 27 years ago on her marriage or in any of the years since? Before travelling to Singapore for extended visits why didn't she ask how long she might be allowed to stay there under the terms of her residency permit? She must have realised a visitors permit would run out. Did she seek to renew it? If not, why not? As a result she has been living here illegally for the last three years, long before Brexit became a possibility, much less a reality. Realistically she has had plenty of time to explore all possibilities in order to remain here, and presumably would not have been trying to do this alone as she has a British born husband and British children to help her through the complexities of the system. But they apparently did nothing, they all kept their heads down under the radar for THREE years, and now she has been removed with all the upset and hurt that might have been easily avoided.