from this poor quality image, these look like
somewhere you will have an infested item of food, like dog biscuits or similar.
I think Stegobium paniceum is a good suggestion, but the dark thorax (top photo) makes me wonder.
Maybe another species of Stegobium.
Or maybe a species of Dermestes, such as D. ater (http://www.thewcg.org.uk/dermestidae/0593.htm).
If in doubt, consult your council pest control officer.
I'm not sure about the one with darker thorax and head, as I can't see the antennae. Are they very long? It could be a beetle called Ptilinus pectinicornis, in the same family (Anobiidae) as the Biscuit Beetle and the Woodworm, itself a wood borer. Here are some pictures.
The others are beetles in the mould beetles family (Lathridiidae), I would say Corticaria sp. Here are some photos of one species. They show up in museum traps in dark areas with humidity.
Thanks guys, thats all really helpful.
I'll try to improve my photography skills should I see some more. I have to say I've not seen any around my flat in the last week after about a month of seeming a few (or more) per day.
Just for clarity, am I right in understanding that its certainly not normal woodworm, but likely to be from the same family, and could also be wood boring then?
Yes, Ptilinus pectinicornis is a type of 'woodworm': http://peter-cox-property-services.blogspot.co.uk/2012/09/wood-borer-beetle-ptilinus-pectinicornis.html
The other one (Corticaria sp.) feeds on mould and fungus spores and never bores wood.
The best thing for an ID is to send us some specimens:
Identification and Advisory Service
Angela Marmont Centre for UK Biodiversity
The Natural History Museum
Cromwell Road, London
SW7 5BD, U.K.