They have drawn up a wanted list of long-lost varieties linked to local places, such as the vibrant "bonfire yellow" daffodil associated with bonfire nights in Sussex. Rare varieties could be lost ...

The first two are extremely elusive, and it is thought 'Sussex Bonfire' may even be extinct in the UK. ‘Mrs R.O. Backhouse’ – one of the first pink daffodils Credit: RHS The RHS says ...