I did this with my mk2 golf gti,
problem being my son who was about 6mths old was sat in his car seat at the time,whoops!!! Normally being a dab hand with a wire coat hanger,i could've got in but luckily,the RAC made a swift entrance and saved him...not that he was bothered! Think they used the old strip of metal with the nick out of it,dad has about 6 of them i think,must swipe one...knowing me though i'd keep it in the boot
On another note,tried the old mobile phone trick the other week with my mates
mk3 ibiza and it worked which did quite surprise me....