Astley and his wife put on the first circus show on Easter Monday, 4 April 1768. Extending the equestrian performance with exhibitions of warlike sabre-work and sword-play. The initial performances were done in the open air at Ha'penny (= Halfpenny) Hatch, a field in Lambeth, London, near the present site of Waterloo railway station. The Astleys also performed at other locations in London. Astley performed his stunts in a circular arena, though Astley never used the title of 'circus' for his shows. Astley's 'Ride' (he also called it 'the Circle') was a ring 65 ft (19 metres) in diameter. Later, the size evolved to become standardised at 42 feet (13 metres) which is the size used by circuses ever since. Leasing more permanent premises at Westminster Bridge from 1769, he improved conditions for audiences with a covered stands. The performances themselves, however, were still performed in the open. In 1770 he hired acrobats, tightrope walkers, jugglers and a clown to fill in the pauses between acts. and so initiated the format which we now know as a 'circus' and which has since spread to many countries.