From ammonia to plastics, there can be no modern economy without a functioning chemicals industry, and Britain's is in peril, writes Sharon Todd The recent announcement of a £350m Critical Chemicals Resilience Fund from Chancellor Rachel Reeves is welcome but it is also an acknowledgement of an uncomfortable truth: the UK's chemicals sector is in trouble. Up and down the country energy intensive manufacturing is faltering. The Chancellor has also announced £120m for the ceramics sector, providing relief to another struggling sector.…