What is a British English word for male sweetheart?

There isn't a single, universally used British English word for "male sweetheart." However, here are some options, depending on the context and tone you're aiming for:

Formal:

* Beloved: This conveys deep affection and can be used in a romantic context.

* Lover: This is more direct and suggests a passionate relationship.

Informal:

* Boyfriend: This is the most common term for a male romantic partner.

* Sweetheart: This can be used for a boyfriend or a close male friend.

* Love: This is a term of endearment, often used in a romantic context.

* Darling: This is a more affectionate term, often used by couples.

* Pet: This is a term of endearment, often used playfully.

Other options:

* Partner: This is a neutral term that can be used for a romantic partner or someone who is not romantically involved but with whom you have a close relationship.

* Significant other: This term is often used to avoid specifying the nature of the relationship.

The best word to use will depend on the specific situation and the tone you want to convey.