If you accept a caution then you can wave your job goodbye.

If you don't accept a caution then you'd have to be found guilty by a court before you'd be waving goodbye to your job.

Whether or not you should accept the caution is something you'd have to weigh up if you ever find yourself in that situation. Look at it this way, holding your hands up and take up as little of their time as possible then that can go in your favour. Holding your hands up and accepting a caution could mean they would have less reason to dig any further and find anything else you'd rather they didn't see. If you end up in court for something where you've very obviously guilty then the court won't be impressed by you wasting their time and you'll come out worse than you would have been by accepting the caution.

If you're a dick to them and fuck them around as much you possibly can then they might decide to fuck you around as much as they possibly. Think about that and consider your options.

Whatever you choose to do will always be a calculated risk. Me, I've held my hands up to possession intent to supply when there's been scales, supply quantities of illicit substances found, etc etc etc. Then I started haggling in the interview room, despite them telling me that's not how it works because of what I'd admitted, I got what I wanted which was a caution for possession.

Oh, when being arrested they were going on about getting a drugs dog to search my house. Ah fuck, I'm in real big trouble if that happens,"okay by all means if you want to or I can show you round and it'll take up less of your time". By sheer luck I managed to keep them away from what I didn't want them looking too closely at, had they noticed it then I'd have been in just as much trouble as I'd have been if they'd got a sniffer dog in so it was worth the gamble.

There is no text book answer, if the worst happens then you're going to need to think on your feet and use your best poker face.

Oh and I didn't speak with the duty solicitor.