Recent polls on the Brexit referendum show that Britain is divided over its future in Europe. The arguments for against remaining in the EU are broadly over the economic benefits versus immigration fears. And that's very much a tale of two neighboring cities, as our business correspondent Owen Fairclough reports.

A city of dreaming spires... Cambridge has one of the oldest universities in the world.

Its scientific researchers have joined forces to lobby to remain in the European Union.

"There are huge fear from people I talk to across the place, around Cambridge - people who live here, people who work in the universities, people who work in the high-tech sector, in the hospitals. They really are worried what the consequences would be. They can see a really bad effect if we were to leave," said Julian Huppert scientists for EU in Europe.

At this antibacterial research company, the fear is isolation.

"The good thing about being part of Europe is that we access 30 percent of the world drug market. The UK itself only accesses three percent. The US accesses 40 percent. If we are out of Europe we are on our own," said David Williams Discuva chief executive.

But the mood is rather different less than an hour away by train.

Peterborough is prime Eurosceptic territory. The UK Independence Party claims immigration from predominantly Baltic and Eastern European member states has divided communities here.

"Peterborough is a very different city from Cambridge. Peterborough has experienced enormous levels of migration over recent years particularly into low-paid, working class jobs, which has resulted in wage compression. So, it doesn't make economic sense for Peterborough as a whole and it puts intense pressure on the quality of life here," said Patrick O'Flynn UK independence party member of European Parliament.