Pictures to follow, but I thought I would get the ball rolling.
The waste pipe from the sink is leaking.
On close inspection there is a flexible pipe leading outside which joins into a compression 90 degree bend outside.
The (long) outside pipe run is not clamped to the wall, but is supported by the flexible pipe which (it turns out) is not UV stable and is crumbling to dust.
An example of an Ikea twin sink waste can be found at
IMHO that should go into a joint inside the house with hard plastic through the wall and on the outside.
I could potentially replace the Ikea fitting with a new one, but I have realised why they probably did what they did.
There is a retaining wall close to the rear wall of the house to keep the rising ground away from the brickwork. This means that the exit for the kitchen waste has to be above the retaining wall and that in turn means that the long flexible pipe run is potentially too long and I'm not sure if you can shorten it.
Anyway, looks as they had a bright idea which worked for a few years but is now failing.
Anyone know if standard waste fittings fit Ikea sinks, or if I am stuck with the same problem as the original fitters?
Cheers
Dave R