I have a Mira shower, which has stopped working - it's reduced to a
trickle, and the "low pressure" warning light is on.

I have been advised that a valve inside the shower is probably blocked
by a crumb of crud, or furred up (the former is probably more likely, as
I'm in Birmingham, and our water is very soft).

Which bit do I need to clean, and how?

I have put two pictures at:

http://www.pigsonthewing.org.uk/Mira1.jpg

http://www.pigsonthewing.org.uk/Mira2.jpg

(about 50Kb each) and would be delighted if someone would like to
PhotoShop an arrow or suchlike, showing what needs doing - don't be
afraid of patronising me, I know next-to-nothing about plumbing.

Thank you.

--
Andy Mabbett
"The Internet is a reflection of our society[ ...]. If we do not like what we
see in that mirror the problem is not to fix the mirror, we have to fix
society." Vint Cerf