I once saw Tony climb up a chimney to take a photograph, so exiting via the boot is not that strange!!
Sorry, Tony, it is a smile situation, though.
The Tech manual I have is US, and I am not that clued up on immobilisers and locks, but a couple of things occur you might check.
First, and you have probably tried this, did you lower the driver's window, and see if the doors would unlock from using the key in the door? Just as a temporary measure?
Second, the doors lock on reaching 15 kph as a security feature. The ignition switch-off opens them again. If yours is not opening again, then the relay that does the open/close bit has died in the closed position, or has a bad connection/is not getting the signal. This is assuming it is not alarm or immobiliser related, but is a good place to start.
Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing
Betty
Jersey Girl Silver '92 UK [Channel Isles] 40K
Jersey Girl @ Mersea
Candy Purple Honda Blackbird
Plum Dangerous
White X2 RVR Mitsubishi 1800GDI.
Vantastic
40,000 miles Jersey Girl