Used these guys recently for Anderson connectors. Hampshire based, seem like genuine Andersons.
https://www.torberry.co.uk/product-category/single-modular-connectors/powerpoles-15-to-180-amps/15-30-45-amp-powerpoles
https://www.torberry.co.uk/product-category/single-modular-connectors/powerpoles-15-to-180-amps/15-30-45-amp-powerpoles