I like the bit where Jenny takes her kit off
Oh, Yeah!
I was 11 the first time I saw that, back in 1976, nearly choked on my popcorn!
I do believe that, aside from maybe Charlotte Rampling, Jenny Agutter is one of the only "respectable" British actresses who regularly got nekkid in every movie she made in the 70's. Very refined voice, very genteel appearance, and WHOA, Did she just take off her clothes again!
For "more" Jenny, watch "Walkabout", from around 1973-1974.