Very long story but i`ll give you the short version.

My father in law lived in singapore for about 15yrs until earlier this year when he returned to the uk seriously ill and needing hospital care.
He had married a phillipino woman in singapore about 10 yrs ago.
Initially when he came back to the uk she went back to the phillipines and is now trying to get a visa to join him here as it appears he will be in hospital for a considerable period of time.
She is in the process of renewing her phillipino passport.
What is the situation here? Can she come to the uk relatively easily? Will she need a visa and if so how much can that cost? They have travelled to the uk together previously.

Any help appreciated as you can imagine its a tense time.

thanks