I thought things were getting intense when I brought the chilli plants and tomatoes into the bedroom to ripen but when bugs got there too I knew something serious was going on! These ladybirds (US ladybugs) might be Harlequin ladybirds, a recent introduction here and one which is spreading fast.
I didn't see many in the garden this year (and I didn't see much aphid activity either - connected?) and I'm wondering why they are colonising indoors?