Perennial plant smells like marzipan

Observation - Perennial plant smells like marzipan - UK and Ireland. Description: Sorry no photo... It's (I think) evergreen perenial (low growing, used as ground cover) with flowers (in January) that smells quite strongly like margipan. Leaves are round (a little like heart-shaped?), flowers are, as much as I can remember, white wit

Sorry no photo... It's (I think) evergreen perenial (low growing, used as ground cover) with flowers (in January) that smells quite strongly like margipan.
Leaves are round (a little like heart-shaped?), flowers are, as much as I can remember, white with purple-ish bits...
Can anyone help?