Thank you very much for you invaluable advice and your time.

In respect of the letter form her employers granting leave of abscence, my thoughts were that she would get such a letter as you describe, but it would only have provisional dates on since we would not be sure when we would be grnted the visa. eg the letter would say that she has been granted leave for 2 weeks during march or april depending on if and when the visa is granted. also in terms of travel plans, we wouldnt want to buy a plane ticket before the vias is granted, so the plan would have provisional dates on and included would be bank stateemts from me showing avaiable funds to purchase the plant ticket once the visa is granted.

in terms of her having reason to return to Ph rather than outstay her visa in uk, she is a a qualified nurse in full time continuous employment.
she does not own property of have children, however she does support her brother who is at university, and supports her mother and close family friends. the difficulty is providing evidence of her support as since it is family, she doesnt have 'recipts' as such. i isuppose she could provide reciepts showing she has paid electric and water bills.

thanks again for your time