To be honest have a good look into materials engineering. However if it's chemical engineering you want to do, take chemical.
Often people don't look at materials because they don't know what it is, despite the fact it underpins every other engineering discipline.
Personally i'd say materials purely because it's what I do, i've not got coursemates who are working for Rolls-Royce, National Composites Centre, Tata Steel, BASF (THE chemical company), and a few others. Others are now doing postgraduate researching for the nuclear industry, the royal mint, developing next gen solar technology and the European Space Agency. So yer we get everywhere.
But if you don't do a subject you can put your all into and enjoy its doesn't matter about the career prospects.
Look into what the modules are, see what you'd most enjoy. (good book about materials engineering is "Stuff Matters" by M.Miodownik -happens to be at UCL though)