Brian sent in these two photos telling us:
Our Colletia Hystrix flowers at this time of year, and has a very strong scent. It has become the flower of choice for the many Red Admirals still in our garden at Harman’s Cross. On 15/10/2023 I counted up to 7 at a time nectaring on it. The only other butterflies we are seeing now in our garden are Speckled Woods and an occasional Small White.