If you go to Brooks of England website, look under saddles you will see "road", "Trekking and Touring", and "Urban & Heavy Duty". The "urban saddles are wider because the thought is that you are in a more upright position and your rear end, being positioned differently on the saddle, requires different widths. It would be worth your while to study that and it may be helpful. It seems that all the "Urban/Heavy Duty" saddles have springs.
If there are shops near you who actually sell these saddles it might be worth a trip to discuss.