Length 6mm. Outer margin of forewing convex; upperside markings blackish-brown on reddish ground, collar dirty-white to rufous (from above), border of stink gland narrowly pale. A2 brownish-black, usually with two conspicuous wide white rings (≈2xA2 thickness) at base & middle; A1≈1.1xA4. 

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

Feeds on a range of deciduous trees - Oak, Hawthorn, etc. Often attracted to light traps.

Summer-Autumn.

Widespread across Britain.

Uncommon.

https://www.britishbugs.org.uk/heteroptera/Miridae/phytocoris_reuteri.html