Sorry fighterpilot,
There is a law, preventing access to the flight deck in flight except to a few authorised persons.
Aviation transport Security Act 4.67 Security of flight crew compartment.
(3) If the aircraft has a cockpit door, the door must remain locked
from the time the aircraft's passenger doors are closed and secured
for departure until they are unlocked to allow the passengers
to disembark, except:
(a) when necessary to allow a person to enter or leave the
cockpit ;or
(b) when otherwise necessary for safety reasons
(4) A person must not be allowed to enter the cockpit after the aircraft
has taken off unless:
(a) he or she is authorised to do so by the aircraft's pilot in
command or the aircraft's operator and:
(i) is a member of the aircraft's crew; or
(ii) is an employee of the aircraft's operator; or
(iii) is authorised or required by the Civil Aviation
Regulations 1988 or the Civil Aviation Safety
Regulations 1988 to enter the cockpit;and
(b) he or she holds appropriate identification as a person
referred to in paragraph (a)
Some airlines wrongly believe they can circumvent these regs by spiriting persons aboard and having them remain on the flight deck for the entire time from doors closed to doors open. Sorry, wrong they are neither authorised or required to be there and a previous Minister of aviation has ruled that that is the intent of the Act.
So to do otherwise is in breach of the Act and is an offence of strict liability.
That means if you're caught = large fine plus you're guilty of said offence until you can prove yourself innocent in a Court of law.
Hope that helps
