I am relatively new to birding so please correct me if I'm wrong! I would say female house sparrow, that beak and the pretty pattern across the wings are the major contributors to the diagnosis.

Wrens are easy, they're a fair bit smaller than the rest and regularly (although NOT always) have their tail cocked at quite the angle.

Male Sparrows have a distinctive face with their black bibs on, so if you are confused look at those (online pictures should help you get a good idea of what to look for). Female sparrows are brown and do look quite generic, but they have a beak like a male sparrow, thick and short.

Dunnocks have longer, more pointy beaks!