There's a problem in an impressions show when you can tell who is voicing the character even when you can't see them. All of Jon Culshaw's characters just sound like Jon Culshaw.
Overall it just felt flat and predictable.
Jeremy Clarkson is in the news for getting upset with catering and hitting someone, so the sketch has Jeremy Clarkson getting upset with catering and hitting someone. No originality or new take on the situation.
When that idea was raised in the writers room it should have immediately been followed by another writer saying 'no, no where near good enough' then everyone else agreeing.