Complex sentence: Except in 1974 when all Swedish based riders were banned from riding in the British League, in England that year, he only competed in open meetings, at Wimbledon and a International Test Match series.
Split into simpler sentences: Except in 1974 when all Swedish based riders were banned from riding in the British League. In England this year, he only competed in open meetings, at Wimbledon and a International Test Match series.