wall stickers for kids

I'm not sure if it was a UK programme, but I saw in the in the UK while growing up. I remember the intro credits panned across a cave wall lit by torch light (which may have had hieroglyphic or other symbols on it).

The main premise was of a curiosity shop that was full of antiquities and I think there was a girl who lived/worked there and each episode was a new mystery - usually involving a different artifact from the shop. For example, in one episode, I think there was an important clue on a label/sticker on the back of a painting that had been on the wall. Most of the show takes place within the "set" of the shop, I think.

It's silly, but the most distinct thing I remember is that the shop phone was either a Pepsi or a Cola can-style phone!?

I don't remember there being many episodes, which may be why I'm finding it hard to track down.

I really hope this rings someone's bells coz I've been wanting to find out the name of this show for years!