Complex sentence: Despite this information, no action was taken by either side, the British police failed to pick him up on his return on 23 August and he used his radio to send several messages from London to Germany over the next week.
Split into simpler sentences: Despite this information, no action was taken by either side. The British police failed to pick him up on his return on 23 August and he used his radio to send several messages from London to Germany over the next week.