Thanks to most of you for the replies.
Who said I didn't know the differences??? I know quite a lot,but not as much as lots of people on this forum, I had hoped someone might be able to offer help with this particular problem.
I have about 200,000 mileage plus points from United. I am sure I will use them on something. I would have liked them transferred to my Avios then I could use them for 9000 points domestic flights within the UK and get flight saver fare which is only £27 instead of paying the tax.