Fingerspelling
If you want to learn more here's the finger spelling alphabet (right-handed version - you can access the left-handed one here: https://www.british-sign.co.uk/fingerspelling-alphabet-charts/) for BSL:
If you want to learn more here's the finger spelling alphabet (right-handed version - you can access the left-handed one here: https://www.british-sign.co.uk/fingerspelling-alphabet-charts/) for BSL: