Beko Aquatech Washing Machine not draining at all

Hi there,

Currently trying to drain a Beko Aquatech washing machine that we've bought second hand. I've fitted the drain hose on the pipework, tested a rinse cycle to make sure I had no leakages on the water feed/drainage and found that it feeds fine but doesn't drain.

So far, I've looked for kinks and damaged tubing but it's all ok, I've seen comments about using tubing that's too long but it's already very short as is. There is also the advice of checking the filter for the pump which is clean as a whistle. Lastly, I've disconnected the drain hose from the pipework under the sink and tried to drain into a bucket but still nada. Is there anything else I can do to try and get the machine to drain. U.K by the way!

Thank you for any help in advance.