CJC wrote:

So really there is two questions, is there a way to definitely get rid
of a crack, if not what would you suggest to hide it so the rooms
finish is not spoiled by it??

Part of the answer is obviously to find out why there is a crack, and
how it is moving. It may be that it is seasonal and opens and closes.
These are often down to tree roots in places with shallow foundations.
Especially on clay soils.

A way to fix it so that it does not show up is to hack the plaster off
for about a foot either side. Now inject resin bonding into the crack.
Next get some expanded metal lath sheets and cut them to the size of the
exposed brickwork. Fixed this in a grid every 6" or so with screws and
plugs with penny washers under the screws. Now replaster. The lath will
help restrain the movement a little, but also allow it to happen
independently of the plaster.

--
Cheers,

John.

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