My objection is the 'maths'
you say 12800 new homes over twenty years, 8140 effectively 'sorted' leaving 4660?
Simply divide 8140 by the six years already expired and multiply by 20 and the total is a staggering 27133! Even if you halve this you are dramatically out!
You have politely positioned the bulk of increase in the 'west' and away from the loveliness of the Harborough / Uppingham / Thurnby Triangle and your assumptions for housing and social housing growth do not include for current European workers to bring there relatives. (as happened with the Commonwealth in the late 20th century. Simple maths demonstrate the need for planning in a growth area