The body length of Amphorophora rubi apterae is 2.2 to 4.7 mm. A. rubi apterae are pale green or yellowish green with pale, slightly swollen siphunculi, . For additional information see the ‘Further info:’ link below.

Amphorophora idaei is similar, but feeds only on Raspberry, not on Blackberry (Bramble).  A. rubi never feeds on Raspberry.

Unless identified by a recognised expert, a photo is required. If the photo doesn't show the key ID features, then in the comments box describe the size and identifying characters you have observed. Please state the host food plant.

Associated with Blackberry (Bramble).

When Bramble is in leaf.

Amphorophora rubi does not host alternate. It feeds on the underside of leaves of Blackberry (Rubus fruticosus agg.) and related Rubus species, but not on Raspberry.

True status in Britain is difficult to determine due to lack of records.

Rarely recorded in Leicestershire and Rutland.

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