Cheers Paul +++ shame tho

Not sure which module but additional switch is used to turn this on and off, when on whenever you come to a stop the car gets held on the brakes until you accelerate - suspect it isn't EPB but purely ABS that does this as sometimes applying the EPB results in a very slight forward movement as the hold moves from the front axle to the rear!

http://images.a8parts.co.uk/parts/24709.jpg

Are you sure Paul??
I have A symbol but on the dash and it's for switching off Auto Stop Start.
There is no off button next to the handbreak.
You could possibly disable it via coding or adaptation.
See attached

Certain - I drive a D4 daily +++

Can't talk for an A3(?) but the button you have pictured is the stop-start function which is different, as indeed is the symbol on it.

On a D4 the auto-hold switch is located next to the EPB switch - as per the pic above. The stop-start disable is higher on the dash near the hazard warning switch.

I had an auto hold "hill hold assist" specified on my 2011 A7 and from memory it had a similar switch to yours Paul. It didn't cost much as an option, something like £120

£120 sounds about right as an option, the actual cost would be about £1 for the switch at most +++

Hmmm....15 plate A3s or just this one hasn't got the extra button for disabling auto hill epb, unless it's an extra option (more money) which wouldn't surprise me.

Edit.
Just seen you guys saying it an option which explains a blank next to the epb switch