Yes please! By adding these activities we know you have commitments on these days so are not available to work, if needed.
They will add an hours value but no sessional value. The consultant contract also refers to this specifically:
Non-NHS commitments
4.24 Any regular non-NHS commitments, including regular private commitments, that may affect the consultant’s ability to meet their NHS commitments should be identified in the consultant’s schedule to provide transparency, assist planning and timetabling of NHS work, and help organise out of hours cover (see also terms and conditions of service).
4.25 Scheduling of NHS work should take priority over the scheduling of non-NHS work, subject to the employer providing sufficient notice of any proposed change to the agreed schedule (see also terms and conditions of service).