Hi there, I googled household mites and they looked familiar to bird mites. Do you have a pet bird in your home? Sorry I couldn’t be more help. Perhaps there are experts out there who will know the answer. Best of luck to you.

I agree bird mites and in the UK very possible you have bird nests near the home '

this is a fix I found

As with many pest control situations, eliminating the source of the problem often brings about rapid results, and bird mites aren't any different. If these pests are found, removal of a bird nest once the birds have left is the single most crucial step. Like flipping a switch, mite activity typically drops off rapidly within a day or two of the nest being removed.

As for the indoors, desiccation is probably the biggest threat to bird mites, so running an air conditioner and/or dehumidifier may help hasten their demise. Vacuuming, using sticky tape or wiping up mites with a damp soapy cloth can all help eliminate any additional stragglers that made it inside. Pest control professionals typically also apply to residual insecticide product to nearby areas to help control any residual mites.