It doesn't matter about any one else's opinion on the Uni. Choose the one you like the best and feel most comfortable at when you go and visit.
But in my opinion, Newcastle > Nottingham > Aston.
If you get a 2:1 in Chem Eng you can walk straight into a job in many different fields, not just chemical engineering. Uni and rank really won't matter as long as the course is accredited by the iChemE - most UK courses should be.
Institute you study at will only affect your employability with local businesses. More likely to get year in industry, summer placement, etc with companies near the uni, that interact with the uni.
Salary is better in other countries. USA, Australia, Middle East, Germany you will make a much higher salary. But you will then have other factors like higher cost of living, paid medical expenses, lack of language skills, etc.