I have wanted to reply to this but I haven’t been able to log on until recently. I live in Hala and curlew and lapsing are commonly mimicked by starlings. I have also heard oystercatcher, buzzard and BHG. For the last two years, a starling has sat on my roof and it interrupts its song with mallard quacks. You look up expecting to see a female mallard with a couple of male attendants, but it is the starling.