No kitten, they do mean a recirculation valve. Part of the emissions equipment on the car, and nothing at all to do with the turbo. The EGR is mounted directly to the bulkhead, and with the A2 being so small, and the bulkhead aluminium, the noise goes straight into the cabin. It is very annoying noise and gives me a headache driving the car around town.
A "fix" can be applied by clamping the vacuum hose that connects the EGR valve, rendering it ineffective (not sure if that would harm the engine, more likely just the environment). Alternatively the noise can be reduced by rubber mounting the valve, allegedly, but people have tried this with little effect. Ideally it needs to be relocated off the bulkhead so the clunk is not trnsmitted to the cabin at all.
The noise does seem to come and go on some cars (it does on mine), and often goes away when the car goes on long trips. It will return though!
Also it appears that some wiring to a temp sender can fail due to a design fault, and when this happens the EGR will activate constantly as soon as you depress the accelerator. I'm pretty sure mine is in this state now, and I am trying to get more details on the wiring fault.
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