Isabel Petrie

Call: 2012

Isabel has a broad commercial and chancery practice and accepts instructions in all of Chambers’ core practice areas, with a particular focus on Landlord & Tenant, Real Property and Insolvency. She is regularly instructed to advise and appear as an advocate in the High Court, County Courts and the First-tier Tribunal (Property Chamber).

Isabel is appointed to the Attorney General’s C Panel of Junior Counsel to the Crown acts for the Government in property-related disputes, as well as in company and insolvency matters.


  • Commercial

    Isabel undertakes work involving all aspects of commercial litigation. She has experience of a broad range of business disputes, including claims concerning the proper construction and effect of contractual terms and conditions; bailment and conversion; the sale of goods and supply of services; agency (including estate agent’s commission); and disputes in the context of joint ventures. Isabel has been led by Romie Tager QC in a two-day appeal to the Court of Appeal in Group Seven Ltd v Allied Investment Corporation Ltd [2015] EWCA Civ 631 and by Gary Blaker QC in a two-week trial in Van Collem v Van Collem [2015] EWHC 2258 (Ch). Both of these cases concerned civil fraud and multi-million pound claims. Her current and recent instructions as sole counsel include:

    • Advising clients and attending a mediation in a claim for misrepresentation in respect of the sale of company shares;
    • Acting for a telecoms company in a trial concerning the enforceability of contractual terms;


  • Company & Partnership

    Isabel acts for an advises clients in relation to company and partnership matters. Her practice has a particular emphasis on claims concerning directors’ duties. Isabel frequently advises and appears as an advocate for the Secretary of State for Business, Energy & Industrial Strategy in relation to proceedings under the Company Directors Disqualification Act 1986.


  • Insolvency

    Isabel acts for a wide range of creditors, debtors and office holders in an advisory and representative capacity. She is regularly instructed by HM Revenue & Customs, the Official Receiver, the Insolvency Service and the Secretary of State for Business, Energy & Industrial Strategy. Isabel’s practice covers both individual and corporate insolvency proceedings. Some current and recent instructions include:

    • Appearing on behalf of HMRC for the Revenue’s petition list in the Winding Up Court;
    • Acting for the Supervisors of an IVA petitioning for the defaulting debtor’s bankruptcy in a case that gave rise to lengthy disputes over IP fees;
    • Advising on and appearing as an advocate for the Secretary of State for Business, Energy & Industrial Strategy in numerous proceedings concerning the disqualification of directors of companies in insolvency situations.
  • Landlord & Tenant

    Isabel acts both for landlords and tenants across a range of residential and commercial disputes. She regularly deals with claims for possession, forfeiture, trespass and nuisance; dilapidations claims; claims relating to breaches and/or enforceability of leasehold covenants; service charge disputes; opposed and unopposed lease renewals; disputes about the validity of property notices; and all other types of landlord and tenant dispute.

    Isabel’s clients include major infrastructure providers such as Network Rail, numerous government departments, commercial investors, utility companies, developers, lenders, LPA receivers and private landlords.

    Current and recent instructions include:

    • Acting for an outgoing head lessee in a multi-party commercial dilapidations matter;
    • Appearing on behalf of the management company of a large residential development in a long running service charge dispute;
    • Acting for the Government’s Bona Vacantia department in connection with properties that have reverted to the Crown with occupants in situ;
    • Advising the pension fund owner of an inner city office block due to be redeveloped into residential units in relation to issues concerning alterations and user covenants;
    • Advising the owner of a block of high value Central London flats in relation to matters concerning noise disturbance, nuisance and covenants concerning alterations.
  • Professional Negligence

    Isabel undertakes work for clients in connection with professional negligence claims related to the practice areas above. Current and recent instructions include:

    • A claim against a top tier solicitors firm arising out of negligent advice as to the effect of a rent review clause in a lease;
    • A claim against a well-known property management and surveyors company arising out of a £20 million redevelopment of a Grade II listed building in Central London.
    • A claim against conveyancing solicitors who failed to recognise the impact of a flying freehold when acting in the purchase of a property.
  • Real Property

    Isabel accepts instructions in relation to all aspects of real property matters, including co-ownership disputes, claims concerning trusts of land and proprietary estoppel. She has been instructed in contentious and non-contentious matters involving questions of Land Registration, adverse possession, trespass, easements and restrictive covenants. Isabel is also frequently instructed by and against banks, institutional lenders and finance companies to advise, draft pleadings and appear as an advocate in disputes concerning mortgages and charges. In 2016 Isabel appeared as sole counsel for the third defendant in Geoffrey John Wilkinson & Others v JS Property Holdings & Others [2016] EWHC 1242 (Ch), a one-week trial concerning limitation, trusts, tracing and proprietary estoppel. Her current and recent instructions include:

    • Appearing for the claimant in a 4-day trial relating to a dispute over the co-ownership of three residential properties and one commercial property. The trial also concerned issues of undue influence and unjust enrichment;
    • Ongoing instructions from a finance company on numerous claims based on charges and guarantees, involving counsel’s input at all stages of the litigation process, from pre-action to trial;
    • Acting for Barclays Bank PLC in a matter concerning protection of security over property the subject of disclaimer


  • Trusts, Probate & Estates

    Isabel’s practice also includes more traditional private client work. She has experience of a range of contentious probate matters, often concerning the treatment of real property on death. Recent instructions have included:

    • Acting for the executor of a Will in proceedings instigated against him by a beneficiary seeking to challenge an interim distribution;
    • Advising the partner of an intestate individual who faced possession proceedings of their family home following his death.
  • Notable Cases
    • Retirement Lease Housing Association Ltd & Anor v Schellerup & Ors (LANDLORD AND TENANT – SERVICE CHARGES – sheltered housing) [2020] UKUT 232 (LC) (23 July 2020)
    • In the matter of Pinnacle (Angelgate) Limited (in Liquidation) [2020] EWHC 141 (Ch)
    • Russell v Cartwright & Ors [2020] EWHC 41 (Ch) (20 January 2020)
    • HM Revenue And Customs v Direct Affinity Events Ltd & Ors [2019] EWHC 3063 (Ch)
    • Secretary of State for Business, Energy and Industrial Strategy v Mehmet Yilmaz  [2019] EWHC 1764 (Ch)
    • Geoffrey John Wilkinson & Others v JS Property Holdings & Others [2016] EWHC 1242 (Ch)
    • Van Collem v Van Collem [2015] EWHC 2258 (Ch)
    • Van Collem v Van Collem [2015] EWHC 2184 (Ch)
    • Group Seven Ltd v Allied Investment Corporation Ltd [2015] EWCA Civ 631