Are you asking if you would be able to work during the 3.5 months, OR whether you would be able to apply for a longer term worker's visa whilst you are here to enable you to stay for an extended period of time?
Thanks for your reply.
Persons applying for a normal visitor's visas are not allowed to undertake paid or unpaid employment. If they do then they will be in breach of the terms of the visa and the UKBA would be entitled to deport the person. This would then prejudicially affect almost all applications for visas that the person may make in the future.
Temporary visitor's workers visa are available but only for some types of work: film crews, news media reps, academic visitors, visitng professors, persons on secondment, company advisers, persons undertaking training,, doctors undertaking exams/clinical attachments, religious workers, sports and entertainers.
Many of the aforementioned would also require sponsors of the visitor.
If you were hoping to work in some kind of care capacity then I'm afriad that, in my view, this would not fall in to one of these categories and therefore you would not be eligible to apply.
Sorry it could not be better news.
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