Brilliant...I guess we will then buy our return tickets after her ILR test.That shouldn't be a problem. She can stay away for up to 2 years without losing her ILR status. But if she wants to get naturalised, prolonged absence can disqualify her and make her qualifying period of residence (3 years) longer. Maximum absence allowed is 270 days combined during the whole of three years, with 90 days in the last year prior to application. There is some discretion over compassionate or occupational reasons, for example, when you have to leave UK to look after a sick relative or if long assignments abroad are an implied condition of your job with your UK employer, Crown service or similar bodies.
She should wait till she gets her biometric residence permit, which is a new requirement for those applying for ILR from 29th February. She should get it in the post within a few days to a week.
That should be fine. Any new rule shouldn't affect her as she already has a visa with KOL REQ.