UK: Kate Foster - Special set of airmail labels

Here is a special set of 8 airmail labels issued by Kate Foster.

Kate Foster - a British artist - made these stickers to celebrate barn swallows migration between South Africa and Europe.

The labels using South African design.

Big thanks goes to Kate for kindly sending these limited set labels for me!!!

Year: ?, self-adhesive. Günter Mair's catalogue no: - GBR-C-?, imperforated, V strips of 8, glossy,
dark blue/white,