I have one key to my car. It doesn't seem to work on the boot. Luckily it's unlocked... Should the ignition key work in the boot, or should there be a separate key?

 

Mine has three keys, Ignition, second fits the doors and the third fits the boot and glove box.

 

I have a key for the ignition and driver door.
I have a key for the gas caps which also locks the passenger door and glove box.
I have a key for the trunk/boot.

It looks like Jaguar played musical locks with their keys & locks.
(';')

 

Edited because i duplicated my own post.

 

Mine has two keys, one regular and one valet, valet will not unlock trunk or glove box, well not without force anyway, locks are 33 years old now, pins are worn, ok i take it back, 3 keys, one ignition, and two door keys one does all locks other just does doors they have different shaped heads, one is concave and one is convexed!

 

I never even thought of trying the keys in the fuel caps, I just assumed it was missing. No, none of them fit.

 

If you want gas cap keys the locks are easily removed to make keys (or re-pin the lock).
(';')

 

I had my Series 3 fuel cap locks re-pinned for the door key, an easy job as Elinor says.

My door key also fits the boot, but none of my keys fits the glove box!

 

I actually have 3 keys. I just thought the other 2 were for gas cap and glove box only. I I tried them and the one for the glove box works on the boot. Its fairly small, so didn't think it was the one. I tried it and it works.

So, I have 1 key for the ignition and doors, one key for the boot and glove box and one key for the fuel caps.

 

Assuming a Series III, the car came from the factory with the following three types of key: ignition key, fitting ONLY the ignition lock (largest, black plastic head); a key for door/boot/glove box/fuel filler (i.e., everything BUT ignition) (all-metal with convex head); and a third key for doors and fuel fillers only (all-metal with concave head).

The factory logic for this scheme has largely been lost over time though, and from what I've read quite a few people have done away with it, either by wearing out the keys/locks or by re-keying to preference. As well many original keys have certainly been lost and replaced. So yours could absolutely vary.

Hope this helps.

Andrew.

Update: just got on a computer where I can read your sig (mobile app didn't show it) and see yours is a Series I, for which the above scheme most probably doesn't apply! ��