Is Imperial College London prestigious?

Sure, but the OP asked about prestige. Comparing UCL and Imperial in terms of teaching is like someone said, comparing the "blue colour with flowers". In some subjects Imperial is better, others UCL, and in others there's no comparison because Imperial has a limited teaching scope.

Prestige for Continental Europeans, Germans, Swiss and Austrians in particular;

Lower than whale **** at the bottom of the sea. Unlike LSE/Oxbridge, ICL is COMPLETELY unknown to the vast majority of continental european employers. We're talking big name engineering employers like Audi, BMW, Siemens, Mercedes Benz (Daimler). They issue "MEng" degrees, not MSci degrees, which means you will be paid like a community college graduate (Fachhochschule). I was pretty much flat-out told this by an executive at one of the above firms; German professor confirmed it.

If you're a continental, stick to RWTH Aachen and ETH Zürich. You're destroying value by attending ICL. Also, you'd be insane to want to work in the UK as an engineer, salaries are 50% of what you get in Germany and 30% of what you get in Switzerland, the engineering sector is in utter shambles in the UK. ICL is only good if you're main academic passion is mathematics (i.e. your writing skills are too bad for business/econ or you simply prefer maths to reading/writing) and you want to go into banking.

Prestige for Continental Europeans, Germans, Swiss and Austrians in particular;

Lower than whale **** at the bottom of the sea. Unlike LSE/Oxbridge, ICL is COMPLETELY unknown to the vast majority of continental european employers. We're talking big name engineering employers like Audi, BMW, Siemens, Mercedes Benz (Daimler). They issue "MEng" degrees, not MSci degrees, which means you will be paid like a community college graduate (Fachhochschule). I was pretty much flat-out told this by an executive at one of the above firms; German professor confirmed it.

If you're a continental, stick to RWTH Aachen and ETH Zürich. You're destroying value by attending ICL. Also, you'd be insane to want to work in the UK as an engineer, salaries are 50% of what you get in Germany and 30% of what you get in Switzerland, the engineering sector is in utter shambles in the UK. ICL is only good if you're main academic passion is mathematics (i.e. your writing skills are too bad for business/econ or you simply prefer maths to reading/writing) and you want to go into banking.

Like others have already said, Imperial may not be as much of a household name in the UK as Oxbridge, UCL or LSE, but if you are going in to finance, engineering or post grad science, employers love Imperial graduates. I don't why OP is so intent on discerning whether Imperial is more prestigious than LSE though, they are compeltely different O.o

(on a side note, literally no one calls it ICL, there are certain academics at Imperial who are very offended by it )

From your personal experiences, has Imperial generally been associated with prestigue and repute from where you are from?

bump

so is it prestigious in reputation?

so is it prestigious in reputation?

Yes but is it better than LSE or UCL?