Complex sentence: Beckett agreed to meet, and she showed him her design for it, and although he said she had got it completely wrong, he gave her permission to stage it, which she did at the Oxford Playhouse.
Split into simpler sentences: Beckett agreed to meet, and she showed him her design for it. Although he said she had got it completely wrong, he gave her permission to stage it, which she did at the The Oxford Playhouse.