Has anyone else had to commute from Guernsey to Southampton for Radiotherapy?

My aunt has just been recently diagnosed and she lives on Guernsey, the treatment that she requires is radiotherapy and this will be done at Southampton. However, she will be required to attend once a day for 21 days and she has a young family who she cannot be away from for this length of time. Has anyone else been in a similar situation? Does anyone know of any assistance that may be available to help her commute on a daily basis? Does anyone know of a radiotherapy service on Guernsey itself?

Thank you