This is quite a distinctive and unusual small moth. The Bird-cherry Ermine (Yponomeuta evonymella) has a forewing length of up to12.5mm (just over 0.5in). These moths frequently visit my garden, and they are often attracted to light. Its white silken forewings with fives rows of dots make this one of the easier ermels to identify, as many of them can pretty much look the same.
The adults fly July to August, and they are attracted to light. Found in woodland and scrub, also in gardens. Common and widespread throughout, especially in the north. The larvae feeds on Bird Cherry, and in sufficient numbers it can become a serious pest.
July 2019, rear garden, South Staffordshire, England. © Pete Hillman.