Poor flow from two hot taps and the hot on the aqualisa thermostatic shower

[chezabha]

Hi. Ive got an issue with the pressure on two hot taps and the thermostatic shower. The water just trickles out of the taps. The downstairs taps are fine and so is the hot tap in the upstairs master sink. I really dont know where to start looking. I have removed the shower head and the flex pipe which screws onto the outlet and the pressure is still the same. I have removed the plastic airflow things from the bottom of the taps and its no different.
I'm wondering if its a problem with the taps and shower as it's not affecting all the taps. The pressure is so low I can place my finger under the tap and the flow will stop. Once I release my finger the flow starts after a slight delay but at the same pressure.
Has anyone got any ideas on what I should do next. Please ask if anymore info is required.

The house is 10 years old, hot water tank is on the landing and cold water tank is in the loft

Cheers for now

 

[chezabha]

Hi. Well managed to blow the mains back up the mixer with a strong hand over the tap and it returned the kitchen hot flow to great pressure. I'll attempt something similar on the taps up the stairs next weekend when I'm free. Thanks to all your help and advice thus far. I will let you know how I get on. Cheers all

 

[stoker122]

If you do the same thing with the kitchen tap and have someone open the hot taps to the bathroom it should clear those airlocks as well