Your employer has a right to be kept informed of progress of your illness/incapacitation and the expected duration of your absence. Your employer may have a detailed 'sickness' procedure to be followed (which is probably incorporated in your contract of employment) and this may include periodically 'phoning or visiting you at home to check how you are progressing. This is standard practice in many larger companies where absenteeism has to be managed. With regard to the work related queries you are receiving, whether this is reasonable will depend on circumstances. For instance, if you are off work with a broken leg (i.e. you are otherwise well, but somewhat immobile) it might be reasonable for your employer to call with the occasional query. If you are bed-bound with a serious illness or if you are off with stress or depression (where employers need to tread carefully), then your employer could be in breach of an implied contractual term (breach of trust and confidence for example). Also, the position you hold will have a bearing on what is reasonable - regular queries to an admin member of staff (whose job might be easily covered by other staff members) might be contrued as harassment (thereby breaching an implied term) whereas at senior manager/director level, where only that person may in possession of particular facts or knowledge, regular calls at home may be perfectly acceptable (provided they are not on their death bed of course!).