In BBC's The Flatmates program, a dialogue goes like:
We are not allowed pets in the flat.
Is it appropriate to drop "to keep" after "allowed"?
In BBC's The Flatmates program, a dialogue goes like:
We are not allowed pets in the flat.
Is it appropriate to drop "to keep" after "allowed"?
We are not allowed pets in the flat.
We are not allowed to keep pets in the flat.
We are not allowed to have pets in the flat.
These sentences are correct and have the same meaning to express pets being forbidden.
To keep / to have are implicit and understood.
Other ways of expressing might be
Pets are not allowed (in the flat).
We can't have pets.
Pets are forbidden.
The original quoted sentence is not North American idiom. It's probably UK idiom, it may be idiomatic only in a subset of UK usage, as it sounds a bit posh to me. "We aren't allowed to to have pets" would be more usual in North America.
But it is certainly grammatical and correct to put a noun right after allowed. "Am I allowed a phone call?" It's just kind of formal.