Which city scheme and which exact providers have you contacted?
Virgin Media does not do Fibre on Demand, and one presumes you have confirmed that FoD (Fibre on Demand) is showing as an option for your individual telephone line?
For those areas where fibre on demand is the FTTP option, then there is only one speed available 330/30, the other GEA-FTTP speed points are not available.
Are you talking to the business or consumer division in BT?