sploop used his keyboard to write :
Thanks all, will follow instructions. Only one other question? Does it matter
where to start? Top radiator? Or is it not important. Many thanks again
fella's

If air is just trapped in the upper part of the radiators, then it
makes no difference which order you bleed them. Often air will form in
one particular radiator (bathroom in our case) for some weeks after and
it may need repeat bleeding.

Sometimes it is better to bleed with the system (pump) turned off, as
the pumps can cause a negative pressure.

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Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk