The Common White Wave moth -- bands can vary from indistinct to more pronounced.
Looks very similar to Common Wave moth below but lower bands are straight and smooth.
Wingspan: 25-28 mm; UK flight time May-Aug.
The Common Wave is very similar to the Common White Wave above, but its lower line is crooked and wavy rather than straight.
Wingspan: 30-35 mm; UK flight time May-Aug.