The Department for Transport has made no assessment of the contribution to carbon dioxide emission or congestion reduction targets of permitting the use of two-wheeled, self-balancing electric transportation devices. However, if, as I understand, their use is likely to be as an alternative to walking or cycling then their potential in terms of greenhouse gas and local pollution reduction would appear to be at best negligible.
There have been a number of meetings, demonstrations and exchanges of correspondence, both at ministerial and official level, with manufacturer representatives. There are currently no plans for further meetings.