General: Deadlocked car with no working key - observations

[LizardOfBodom]

Just thought I will share it here for future readers, as some info may come handy in similar situation.
Work colleague locked key inside his S40 2006 yesterday. As you know, its fairly easy to do it as all you need is to press the fob to lock the car with one door open, then leave key on the seat/floor/whatnot and close the door shut. Car does a nice "indicator flash" showing it is fully armed and will deadlock itself in 10 seconds.

Now, the plot thickens as replacement key he brought did not work - the fob was unresponsive even after changing battery, and also there was no physical blade on it (thats how it was bought) so we couldnt open the car with it either. The only option was to call in a mobile locksmith that opened the car in exactly 5m30s from approaching the car. No idea how (trades secret blah blah) but there is no signs of forced entry and drivers door are open. IMHO he musty have picked the lock as its the same as opening it with blade. The lock on drivers door is now opened, while all other doors remain locked and not possible to open from inside (deadlock still activated).

Now the twist: there was NO key inside the car. Whatever happened, its still unclear but the main key was not inside.... With alarm blaring I tried that second key but exactly as I suspected - didnt work. Car didnt even do "bzzt" of accepting the key and unlocking the lock, clearly showing car is not paired to it.
Now, I did a test on my own car to replicate the issue and I was able to disable blaring alarm by putting key into ignition evben when car was in deadlock mode, so it only proven that his car was not paired to that key.
Its a 1.6D by the way so as you all know its really easy to loose pairing with them....

Summary: its a bit unclear what to do now, the original key evaporated (literally), second one doesnt work. Even if towed to dealership, they will probably need to order brand new one as I am not sure the key can be programmed back in OR it its a key from this car at all (it was never tested before). Also car is blaring the alarm every time I open the bonnet or enter the key in ignition, Im wondering if its not gonna loose all the power etc before its sorted. Currenty, its sitting on work's parking lot with drivers door unshut so its accessible, but thats all.

I doubt anyone will have any advices as I am pretty sure not much can be done in that point, car wont even connect to my Vida as key is not present in POS2. Bit of a weird situation, so i thought someone may find it interesting.

also a warning to mind your keys after you press "lock" button as it can end up badly....