If the unis I've looked at are any indication then many offer an integrated masters programme but most students will be on the bachelors route. At the institution where I work (Uni of York) many more BEng degrees are awarded than MEng.

You don't need the Masters degree to be a chartered engineer as far as I know.

If you graduate and gain enough experience on the job (probably more cost effective than being at uni for another year) to be considered to have an equivalent standard of education I believe you can become a CEng with a presentation.