Best water heating option for small house

Senature

Hi, looking for some advice/expertise please.
I am looking at replacing a hot water tank. The house is a smallish 2 bed, no central heating just various electric heaters and open fire, 1 shower with instant hot water, no bath. Washing machine is cold feed. There is currently an average sized hot water tank in a traditional style hot press/airing cupboard but really hot water is only needed for dishes, housework, handwashing, shaving etc. (Unless there is something really obvious I might be forgetting!)
What is the best or most cost effective option to heat and store hot water for such small level of usage?

antoinolachtnai

I had something similar and a plumber suggested an instant hot water heater. (This kind of thing, but seek your plumber's recommendation. https://www.ie.screwfix.com/ariston-3kw-10ltr-undersink-water-heater.html )

I would also get a small dishwasher if it was me (in this particular place this was one thing I actually did, I kept the cylinder in the end). If you use a dishwasher, you just don't need that much hot water at the kitchen sink.

Conservatory

Put your immersion on sink?

Idbatterim

Often you can reach the sink with electric shower hose to fill it. For dishes I used to just boil kettle. For hands, who cares if it’s cold ...