Might other people ever collect DS?
Is his Dad about? What direction does he work? For us, DH and I work in opposite directions, so the kids are close to home. It means either of us can collect and drop off. We are also walking distance from nursery, and on occasion my Mum has driven up, collected the kids from Nursery, and spent an hour with them before I get home (and then stayed the night, and taken them back the next morning).
Several years in the future, but DS1 is also at school with people he was at nursery with.
However, I have heard people say having them next to work means you get more time with them (in the car / bus), or collecting them if they are ill. It also makes early starts at work easier, as you don't have to wait for nursery to open, and then do the travel - tho if you are talking about biking, I guess it isn't too far?
We have no family in the area, but next week I am collecting a friends kids who are at the same nursery, and bringing them all back here, due to a shift clash. I wouldn't be able to do this if we didn't live close to each other, and close to nursery (we'll be walking home, except for the baby, who will be in the old pushchair).
Good luck with the interview - if you think you might change job, closer to home is better!