Water / Heating Advice Please !

RajaStyle

I am looking for some advice with how best to resolve my water pressure within my property.

4 bed property with kitchen, 1 bathroom and a electric shower/wet room downstairs. Standard water tank, cylinder & boiler setup with 15mm pipes running through property.

I want to add a shower to the upstairs bathroom which does not have one.

I called the water company out and they took a look at my pressure & flow, they said my pressure was good over 2 bar but flow rate is poor. Seems to be a blockage somewhere better off putting in a new water main rather than pull up all floorboards etc looking for blockage. So I installed a new water main with 25mm poly connected to existing 15mm pipes in kitchen.

We get good cold water flow & pressure now but hot water is still poor. They said it was down to 15mm pipes going through property all the way to the water tank in loft. Pity they didn't tell me hot water wouldn't be resolved before starting the work. Electric shower in wetroom using cold pipe only has got slightly better but not dramatically I thought it would be gushing ... maybe because again at the end of 15mm pipe.

So any recommendations would be much appreciated. I think below are the options I have, which one would be best ? would they all work ? is there a better one ?

1. Add a Stuart Turner 3 bar pump next to cylinder to pump whole property ? not overly keen on this as I have been told very noisy and will go off everytime even in middle of night if someone gets up for loo.

2. Add a electric power shower downstairs and normal power shower upstairs, I believe these come with a pump buit in. However this won't resolve poor hot water in kitchen ... can you add a pump below the kitchen sink also ? Can you just swap a normal electric shower with a electric power shower simply or is there more involved ?

3. Replace the cylinder with a megaflo cylinder and then add normal shower upstairs, will this work ok off 15mm pipes or would they need replacing also ? as this is pressurised would this resolve all ?

4. stage option 2 adding power showers and then add megaflo at later date ? can this be done or will it be overkill ?

We moved in last summer and had the whole property refurbed .... i know should have done this first ... so also worried about mess will create.

Anyway Thanks in Advance all advice greatly appreciated ... which way would you do it etc.