http://www.sitebox.ltd.uk/product/10081637/msa-scap-escape-respirator-in-cardboard-box/

A little pricey but might be worthwhile if working off shore or in a building higher than 5 or 6 floors (higher than a standard fire vehicle ladder).

Some glove protection (even if it was just a pair of merino wool liners)

http://www.thermalshop.co.uk/products/gloves_merino

would be useful for flash over protection.

Stay away from cheap polyester business suits.