Insight: Alex Bloxham, head of residential lettings at Bidwells, takes a look at the Cambridge lettings market and the impact of the region’s prowess in science and technology. Charlotte Grainger is 37, she has recently moved with her family to Cambridge. She works as a senior engineer for MathWorks, who have expanded their office space in the city. Her husband also works in the science, tech and innovation sectors, as a director for AstraZeneca. Their daughter is just starting at their local secondary school. Charlotte and her family relocated from Massachusetts the US, when the opportunity c…