Right it sounds like the machine has error code 11, which is a filling error.
The fact engineers have been out suggests this could also be a control board failure, since I would have expected the engineers to see error 11, look at the inlet valve test that is working and the hose isn't crushed\kinked.
Providing your sure the inlet hose is letting water to the machine, with the power switched off I would check the machine filter, drain any water which may have found itself inside previously, with the filter left open and a bowl\towel in place to capture any water, set the machine to a rinse programme (10 o'clock position), turn the power on and see if it will start, I would then power it off and try and set it to drain (one click anti clockwise) and see if that make the pump start, which you can see from the hole where the filter sits.
If these tests fail its a control board failure, which is £150 part so you need to get on to Zanussi.
Please let me know if you need anything clarified.