They were both within the UK, posted to the same area, Birmingham, on the same day - I'm sure they are in one bag that's gone astray. It's possible they'll still turn up. 2nd class Signed For was the service (which used to be called Recorded Delivery). It gives you proof of delivery, but not full tracking, so if it's lost you can't trace it. It's very cheap and in theory includes compensation for loss up to about £40. It's good for cheaper items. This the first time I've had something not arrive.
Thanks for the tip about 3rd party insurance, I will look into that.
Joules Royal Mail is by no means infallible! There was a scandal a few years ago where it was discovered one sorting office had been infiltrated by a criminal gang, who were working there solely to steal.
But I didn't mean I would stop using Royal Mail for international - just domestic, where there is now a lot of competition and other couriers available, like I said I'm thinking of using CollectPlus more for UK deliveries, which is fully tracked, and actually cheaper for anything over 2kg, and has a convenient drop-off point in my local shop.
I used to send loads of stuff by regular Airmail, untracked and unsigned for, and I never lost one parcel.
Internationally, Royal Mail's Airsure service is very good, fully tracked and a day faster than regular airmail, but is only available to certain countries (the USA being one of them, but not Australia annoyingly). International Signed For is like domestic Signed For, you get proof of delivery if it arrives, but not tracking. I use Airsure if available for international post, it's only slightly more than International Signed For.
it's great to hear you've both been fully compensated, thanks. We'll see about the jewellery though, I have a feeling that might not go through.