Do you see anything about a signed agreement anywhere? All you have there is one sentence uttered by a British minister at a press conference, and for all you know, "military" assistance could mean exactly the same as for Ukraine: sending weapons.
Misleading exactly in the way I said: the wording used is “help”, not defend, and nothing is formalised. Ukraine is getting “help” as well, but it is not exactly NATO article 5 protection.