Complex sentence: New Constables were given their uniform and an instruction booklet and then sent off to work without any training or guidance, it wasn't until 1843 (and later 1855) that they were given training.
Split into simpler sentences: New constables were given their uniform and an instruction booklet and then sent off to work without any training or guidance. It wasn't until 1843 (and later 1855) that they were given training.