I planted a laurustinus (Viburnum tinus) bush on a large pot a couple of years ago and placed it opposite the window where we eat, a sheltered patio area. I did not realised at the time what a great location this was and what a fantastic bug magnet this bush is. One of the best features of lauristinus is its long winter flowering season (from October to May). My new vantage point has also revealed that their pollen and nectar rich flowers are often visited by honeybees, hoverflies and droneflies during mild winter days, as you can see in the photos below, all taken a few days ago. Come spring they are also visited by butterflies like the Holly Blue and early bumblebee Bombus pratorum queens. As this hardy bush does not mind shady conditions, their pink-white flowers are a good way of lightening dark corners of the garden.
A poor shot of Episyrphus balteatus
Eristalis sp. Dronefly.
The one on top of the post is possibly Meliscaeva auricollis, thank you Geoff F from WAB for the tentative ID given the difficult angle.