I really like Kulveer Ranger’s enthusiasm (26 November, page 36) - these large infrastructure projects need huge amounts of positive energy from those in the driving seats to make them successful

Above all, we need to be very clever in building economically the right engineering solutions. That will allow us the manoeuvring space to get decent architectural design, too.

Helen Brunskill, Brunskill Design Architects (transport specialists), veteran of St Pancras station redevelopment, via building.co.uk