Hi when i go over 70mph a constant beeping goes off in my 2007 corsa 1.2cdti how do you turn it off please?

Owners manuals Here are the manuals it is pretty descriptive as to how to do this.

Pull turn signal stalk and wiper stalk
simultaneously to the steering
wheel until you hear a confirmation
signal (approx. 3 seconds).
? The miles display shows P1.

Push the turn signal stalk (left) up
or down and select the desired
function p6

Push the wiper stalk (right) up or
down and select status On or OFF,
or input a value for speed (P6) or
value for volume (P7).
? Pull turn signal stalk (left) and wiper
stalk (right) simultaneously to the
steering wheel until you hear
a confirmation signal (approx.
3 seconds).
The selected settings are now stored
for the key in the ignition lock. To
activate and deactivate the functions
and set the functions selected, please
see the relevant sections.
Repeat the procedure to program