Thanks for the reply steve,
I have just found this,
Certain other activities which would normally be classed as aerial work may be carried
out by Permit to Fly aircraft subject to specific limitations as follows:
a) The towing of gliders and hang gliders by microlight aeroplanes; and
b) Flights classed as private under Article 130(1)(b) of the ANO, undertaken for the
purpose of giving instruction, when the only payment made is for the services of
an instructor.
No mention at all about any limitations on what type of course.
I have heard about the sole owner requirement before but can't seem to find that anywhere yet. I do own my RV with one friend, not sure if that becomes a group or is just co-owned.