I concur with Wanderer in cautioning against such long visits to the UK.
The rules for visit visas are broad and generalised and not quite as nuanced as those for immigration. Broadly, the visitor is expected to be resident in his home country for longer than in the UK. And they disallow residing in the UK under the guise of a visit visa.
Have a read of the
detailed guidance notes, particularly Section 4.2(b).
V 4.2 The applicant must satisfy the decision maker that they are a genuine visitor. This means that the applicant:
(a) will leave the UK at the end of their visit; and
(b) will not live in the UK for extended periods through frequent or successive visits, or make the UK their main home; and
(c) is genuinely seeking entry for a purpose that is permitted by the visitor routes (these are listed in Appendices 3, 4 and 5); and
(d) will not undertake any prohibited activities set out in V 4.5 – V 4.10; and
(e) must have sufficient funds to cover all reasonable costs in relation to their visit without working or accessing public funds. This includes the cost of the return or onward journey, any costs relating to dependants, and the cost of planned activities such as private medical treatment.
By repeatedly visiting the UK for six months at a time, your mother is giving the appearance of residing in the UK with you.
Visit visa are meant for short visits, like the ones most British make to their family home for Christmas; short, memorable and rare. Two-three visits of between 2 weeks and a month sound like a visit. Six continuous months every year sounds like residence.
Be aware that although she has a ten year visit visa, it can be revoked at the airport by the Immigration Officer if he feels that the person has a pattern of residing in the UK rather than visiting. So, just having a visit visa is not enough to be guaranteed entry into the UK. Also, if cancelled on these grounds, there is a good chance that all subsequent visit visa applications may fail.
Also see similar cases on these forums.
http://www.immigrationboards.com/genera ... 00084.html
http://www.immigrationboards.com/genera ... 95597.html
If she is visiting, why not have a vacation in continental Europe with her and the whole family? That is how I meet my family members. That makes it memorable for them and at the same time, does not run foul of UK Immigration Rules. That way, if they need to visit me in the UK for important occasions, such as for the birth of their grandchild or for a family function, they can.
I am not a lawyer or immigration advisor. My statements/comments do not constitute legal advice. E&OE. Please do not PM me for advice.