if you can erect a small plastic tent to go over your ficus and place on a window ledge or conservatory away from any direct sunlight and away from any forms of direct heat , rads etc she will winter fine , keeping the temp above 15c , in the spring when there is no chance of a last frost and night tempos are above 15c place her outside away from any direct sunshine , if you can get yourself a green polythene lean to greenhouse in the summer you can start defoliating her and get fresh new growth , feel free to contact me and i can give you more in depth advice , dont worry to much though as they a very hardy plants