The train company c2c is offering a flat-rate return fare for trips from London to Southend-on-Sea and surrounding areas this month. So long as you buy at least a day in advance, then a flat-rate £15 return fare is available from most London stations served by c2c and also to several stations around Southend-on-Sea. The offer is available from your preferred train ticket seller – and obviously from c2c’s website – and is valid throughout August 2026. Not all train times are offering the flat rate, but quite a lot are, and unsurprisingly, off-peak/weekends only. £10 return fares are also available on non-London origin journeys.