Invalid currency code

I’m getting a “Invalid ISO 4217 currency code” error from Google Search console. It doesn’t seem to like £ symbols.

There is some general weirdness going on though. This is showing £ on the page but doesn’t have a currency set in the block.
https://thegothcalendar.co.uk/event/resurrection-scarborough-live-the-danse-society-the-glass-house-museum-westenra/

but in the metadata:
“offers”:{“@type”:”Offer”,”price”:”10″,”priceCurrency”:”USD”.
presumably it defaulted to $ even though it doesn’t show.

This one generates the error in Google:
https://thegothcalendar.co.uk/event/anti-fest-a-protest-gig-13x-holy-braille-syd-31-arch-femmesis-chaos-lol-kult-303/

Shows as £ on the page and is set as much in the block. In the metadata:
{“@type”:”Offer”,”price”:”2″,”priceCurrency”:”\u00a3″

Looks like the encoding from the block for the meta data is wrong?