Partner - Planning, and Head of Development of Land
After spending a number of year in local government, Rosalyn joined Thrings in 2014. As a Partner in our Planning and Environment team and Head of our Development of Land team, she advises on a wide range of development schemes, acting for housebuilders, housing associations, developers, promoters and landowners.
Rosalyn is ranked as a leader in Planning in the South West by Chambers and Partners and recommended by Legal 500. Her dedicated professionalism makes her a key asset to the Development of Land and Agriculture teams.
Alongside her role at Thrings, Rosalyn is a regular speaker at sector events including BIAC national rural planning seminars, Insider SW Property, Women in Property, CIBSE and Movers & Shakers. She became a committee member of the Society of Agriculture in 2026.
Development of Land
As Head of the Development of Land team, Rosalyn's expertise Rosalyn's expertise focusses on planning and environmental matters including the negotiation of infrastructure agreements including section 106 agreements and other infrastructure agreements. She provides specialist advice on planning strategy for development schemes, interpretation of planning policies and the Community Infrastructure Levy.
Rosalyn advises clients on schemes of all sizes, including residential, mixed-use and commercial developments, taking clients through planning and environmental due diligence at the acquisition stage, drafting of planning and environmental clauses within transactions through to negotiation of planning obligations and conditions. Rosalyn is also experienced in High Court challenges, planning appeals, certificate of lawfulness applications and resolution of planning enforcement matters.
Agriculture
Working closely with the Agriculture team, Rosalyn brings her expertise of planning policies to advise landowners and farmers on diversification and development projects, including strategic land, natural capital and clean energy schemes.
advising Baylis Estates on the SouthPoint Business Park in Chippenham, Wiltshire; a 50,000sqm commercial development scheme, specifically advising on planning strategy and negotiation of planning points arising in the plot transactions and infrastructure agreements with the Council. The scheme won Deal of the Year in the 2025 Insider Property SW Awards;
advising landowner client on the Ashton Park Trowbridge development scheme of 2500 homes, 13.6ha of employment space, two primary schools, a secondary school, shopping and community centres and associated infrastructure and highways;
advising a farming client on a 5 dwelling scheme and diversification project including rural worker’s dwelling and holiday lets, a complex enforcement notice appeal, including planning strategy advice and s106 agreement;
advising on planning strategy, interpretation of policies and planning elements of the option agreement for a proposed 175-unit scheme for a registered provider in the South West
advising on an appeal and a section 106 agreement for a 150-unit scheme including Network Rail negotiations for a promoter in the South West
advising a majority landowner in a circa 1,000-unit scheme in the South East on the section 106 agreement and negotiating ancillary deeds to manage future liabilities
negotiating section 106 agreements and associated deeds of indemnity for a group of landowners as part of a complex multiple party arrangement for the promotion of land for a 680-unit scheme in the South East
securing vacant building credit and a community infrastructure relief for a brownfield heritage development scheme of 77 houses, and negotiation of the section 106 agreement for a regional housebuilder in the South West
providing planning due diligence and advice for a strategic commercial development scheme (offices, storage and distribution), informing planning strategy and negotiations of the conditional contract for a developer in the South West
reporting to a client taking an interest in the Shard on planning due diligence matters
undertaking a successful Judicial Review of Bath and North East Somerset's decision to grant planning permission and listed building consent for a major care home expansion contrary to officer recommendation, on behalf of a local resident. Read the article here.
Ros is outstanding - a tactician of the highest order and nothing fazes her. She always wants to discuss and she is happy to put forward her own point of view but listens to what you have to say.- Chambers 2021
