请教大家，我爸妈今年3月10日离开的伦敦（待了6个月），现在打算8月20日再来，你们觉得入境处会challenge他们吗？
我看现在的UKboard文件是这么写的。貌似是没有明确规定。但是还是怕爸妈会被海关人员查处。有点怕怕。谢谢大家了。
There is no specific limit on the number of visits an individual can make to the UK, such as a definitive rule which states that a visitor can only remain in the UK for ‘6 months in 12 month period’ rule. But visitors must not be living in the UK for extended periods because of frequent, successive visits. For example:
• where an individual spends five or six months in the UK during a visit and returns after a short break in their home country for a further five or six months, or
• if they are living in the UK for successive short periods and breaking this by leaving for a couple of days, for example, someone living in the UK during the week and breaking
this by leaving the UK at the weekends.
This could amount to genuine residence. However this is not a hard and fast rule and the circumstances of each case needs to be considered on an individual basis.
Assessing residence through successive visits You must consider the following factors when forming an overall assessment as to whether the visitor is residing in the UK because of frequent, successive visits:
• Purpose of visit and intended length of stay as stated on the visitor’s visa application form or to the Border Force officer.
• Number of visits made over the past year (rolling 12 month period), length of stay on each occasion, time that has elapsed since last visit and if this amounts to the individual
spending more time in the UK than in their home country.