Count Down To The Winter Solstice .. Day 1

Grey weather but not quite as cold .Out for coffee where I sat outdoors with 
some I knew & discussed cameras..Makes a change from Covid19. I saw the above  in the courtyard on leaving my flat. Not a clue  what they are maybe someone on blip will.  Easter / Halloween / Winter Solstice / Summer Solstice /are very special to me .( Christmas can come and go ) 
Winter Solstice is Tuesday 21st December northern Hemisphere )16:58cet  
After that we get more daylight .It may seem very slow.Why not  celebrate on the 21st and look forward . 
Have done more Dr G work and think the above maybe 'Bird Cherries' (Prunus Pensylvanica)