Best science / engineering job?Watch
Engineering does pay better in America, and also many places on the continent too.
Chemical/Petroleum Engineering is generally the highest paid. One of the advantages of studying something like this is that you can be very geographically mobile and easily find work where the best opportunities are. Especially in Oil & Gas.
I graduated in 2012 and have been based primarily in London working in the Oil & Gas/Petrochemicals industry. Salaries vary generally based on how remote or dangerous the location is you are working in. However, it is certainly possible to make a good salary being based in the UK .