Lathraea clandestina is a parasitic plant with no green leaves and lives underground, emerging only to flower. More info' at http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:662042-1
It is common in damp places in Sussex such as here at Wakehurst Place on 29 February 2020.
|Purple toothwort centre picture. Click to expand.|
|Purple Alder buds|