Today Transport for London have revealed a consultation on a change to the 167 Bus Route. They plan in future to run it along the same route except stop at Loughton instead of Debden. They also plan a new school bus route from Ilford to Debden the 677. Please take part in the consultation: https://consultations.tfl.gov.uk/buses/167
There are no planned changes to the Number 20 Bus Route.