Sixty-nine trees will be pruned to remove hazardous dead wood, 36 will be coppiced to allow the stump to re-shoot and 19 will be felled.
The work is part of an action plan that received a £225,000 grant from the Heritage Lottery Fund in December. It aims to increase community participation, restore management of the woods and allow the reintroduction of green woodwork and woodland crafts.
Meanwhile the council has commissioned arboriculture consultant A. T. Coombes Associates to revise a 20-year management plan for Bretton Woodlands to focus on accessibility and the health of trees. A friends group will be formed to ensure management becomes community led.
The council’s natural and historic environment manager Darren Sharpe said: "The works are vitally important to protect these ancient woodlands and ensure that they are able to thrive for hundreds of years to come.
"Without management the woodland will become more dense with low light levels, pathways will deteriorate further, rubbish dumping will become more of an issue and there will be very limited regeneration of new trees and ground flora to protect the woodland in future."