I was in a similar situation few months back.
I suggest talking to alums of all the 3 schools to get an idea about culture.
Also following are the points that you should consider before making your decision:
1. If you want to recruit in Europe then INSEAD would be a really good choice.
But if you only want to target UK then I would suggest go with LBS.
2. Though I have heard LBS is good for finance but INSEAD isnt bad either and they are trying to improve on the consulting-only image 😬
3. If internship is something that you really want to do then you can do a pre MBA internship before starting your 10 month MBA program with INSEAD in August (in case you have jan intake offer then they do have 2 months for internship in betwn)
4. Wharton is one of the best in US. But considering you specifically want to recruit in Europe then you can conside either INSEAD or LBS
5. INSEAD is the cheapest option, so if money is a concern then you should go with it or try to negotiate scholarship with others