approx 1 cm in length. with brown abdomen (hairs in bands) and thorax with white hairs.
No interactions present.
Thank you, after a second inspection after some research on Osmia rufa I agree. Many thanks for the help.
Lat/Lng: 51.501480015914, -0.20319879055023
OS grid ref: TQ248795
located in an urban park, recorded entering holes in a park railing