I am the brother of Miss Dyson (now Mrs Anne Ncheke living in Lesotho) mentioned above. I do not remember ever having an open top sports car - in the years 73-77, only MK1 Cortina. Are you sure it was not slightly later when I had a bright read Ford Fiesta 1100 cc with tilt/sliding/removable roof? I can certainly remeber the journey but am not sure if any car I owned at the time could do 100mph. I have forwared the address of this web site to my sister and she may well reply. There is a possibility she may be comong over to London later in the summer