Gardena tap Connector for Indoor taps: Connection for Indoor taps, Including Adapter for Aerator Head, Spanner for Easy Fitting, for Kitchen and Bathroom (18210-20)

try one of these types https://www.amazon.co.uk/Gardena-Connector-Indoor-Metallic-Orange/dp/B07YSSVYH4 https://www.screwfix.com/p/hozelock-34-x-43mm-mixer-tap-connector/3485T?tc=PC6