The wingless aphids are medium-sized to rather large, broadly spindle-shaped, shiny, and pale to dark green or deep pink to red-brown or magenta, with shiny black head. Antennae and legs bicoloured, yellow and black.  The cauda is pale yellow. The adult aptera of Macrosiphum rosae is 1.7 to 3.6 mm long.

As the name suggests the aphid is to be found on various types of rose (Rosaceae sp) and mainly colonises tender flower buds, young shoots and lower surface of young leaves.

Best seen from June to October

They bear live young as opposed to laying eggs.  Can be a pest of cultivated roses.

Common and widespread in Britain.

Common in Leicestershire and Rutland.

https://influentialpoints.com/Gallery/Macrosiphum_rosae_Rose_aphid.htm