Skip to content

Yulia Vaynzof

Partner

020 3319 3700

yulia.vaynzof@keystonelaw.co.uk

Yulia is a corporate lawyer with over 14 years’ experience advising clients on domestic and cross-border private mergers and acquisitions, joint ventures, strategic investments, corporate reorganisations, commercial agreements, and other transactional and advisory matters.

Her practice focuses on the energy and infrastructure sectors, including renewable energy, upstream oil and gas and natural resources. She advises in the UK, as well as internationally across the Middle East, Africa, Asia, Europe, and the former Soviet Union states. Dual-qualified in England and Wales and in Russia, Yulia combines strong transactional expertise with an understanding of civil law systems to help clients navigate complex deals both in the UK and across borders.

Yulia acts for energy companies, national oil companies, investors, corporate groups, and individual shareholders.

Expertise

Yulia advises clients on private M&A, corporate transactions, restructurings, and strategic investments across a range of sectors. Her experience includes both domestic and cross-border acquisitions and disposals, sanctions-related restructuring projects, joint ventures, and investments.

Experience

  • Advised a domestic renewable energy company on a series of asset and share acquisitions in the UK.
  • Advised an international oil and gas company on its exit from an upstream joint venture in Pakistan.
  • Advised on a joint venture shareholders’ agreement between Africa’s largest integrated energy company and a major essential materials manufacturer.
  • Advised a major oil and gas services company on the restructuring of its Russian operations in anticipation of sanctions-related risks, and subsequently on its exit from the Russian market.
  • Acted for a group of individuals on a £34m sale of their UK beauty business to a private equity-backed buyer and subsequent advice on earn-out payments in the form of loan notes.
  • Advised a Chinese client on a US$500m sale of a UK computer gaming company including vendor due diligence reports, legal opinions, and a charge over shares as security for post-completion payment.
  • Advised a UK meat processing business on a series of domestic acquisitions in the sector including urgent purchase of a distressed company from administrators.
  • Advised an investor on a joint venture in the UK property sector.
  • Advised the founder of a UK battery start-up on their exit from the project.
  • Advised an international testing and certification company on group reorganisation, intra-group debt restructuring, and dissolution of subsidiaries in the UK.
  • Advised a UK investor on the acquisition of shares in a distressed mini-refinery business, including substantial petroleum product stock, conditional on the lifting of freezing injunctions over the target assets in Kazakhstan.
  • Due diligence of the client’s asset ownership and holding structures across multiple jurisdictions, as part of the asset disclosure exercise in a $6 billion fraud litigation.

Yulia advises renewable energy businesses, investors, and developers on strategic transactions, including acquisitions, disposals, joint ventures, and key commercial contracts. Her sector focus is on biofuels, biomass, anaerobic digestion, food waste collection and processing, and waste-to-energy projects. Yulia supports clients through growth, investment, and business integration projects.

Experience

  • Advised a UK renewable energy company on the sale of its anaerobic digestion facilities and food waste collection business.
  • Advised a client on the acquisition of two biofuel feedstock supply businesses, followed by an intra-group reorganisation to integrate the acquired operations.
  • Advised a UK renewable energy company on its European joint venture with a multinational agribusiness.
  • Advised a client on a series of share and asset acquisitions, including an integrated cooking oil supply and recovery business, UCO collection businesses, an anaerobic digestion plant, and bulk liquid storage facilities in the UK.
  • Advised a client on long-term commercial agreements including digestate contracts.

Yulia advises international energy companies, investors, and service providers on asset acquisitions and disposals, farm-ins and farm-outs, joint operating agreements, production sharing agreements, and other petroleum contracts. She has particular experience supporting clients on transactions across Africa, Central Asia, the Middle East, and Europe.

Experience

  • Advised a client on key upstream petroleum project agreements in connection with the proposed acquisition of an interest in upstream exploration and production assets in the Caspian region with an estimated value of $1bn.
  • Advised an oil and gas company on the proposed acquisition of a working interest in an upstream exploration-stage project from a defaulting co-venturer and the re-negotiation of a production sharing agreement with a West African host state.
  • Advised an international oil and gas company on its exit from an upstream joint venture in Pakistan.
  • Advised a listed Indonesian oil and gas company in connection with the sale of its interest in a development-stage Libyan oil and gas project to the National Oil Corporation of Libya.
  • Advised a client on aspects of a $800 million sale of a 25% non-operated interest in a petroleum development in the Republic of Congo.
  • Advised an independent oil company on the sale of its interest in a major offshore West African oil and gas discovery in return for cash consideration and a gross overriding royalty over future production.
  • Advised a European oil and gas company on divestment of its two concessions in Tunisia.
  • Advised a major oil and gas services company on the restructuring of its Russian operations in anticipation of sanctions-related risks, and subsequently on its exit from the Russian market.
  • Advised a UK investor on the acquisition of shares in a distressed mini-refinery business, including substantial petroleum product stock, conditional on the lifting of freezing injunctions over assets in Kazakhstan.
  • Advised a Russian oil and gas company on a $410 million acquisition of interests in two petroleum blocks in northern Iraq.

Yulia advises organisations in the energy and natural resources sector on cross-border M&A, joint ventures, corporate finance, and restructuring matters across traditional and renewable energy markets.

Experience

  • Advised an international energy company on the disposal of assets in Ghana.
  • Advised on the $800 million sale of a 25% non-operated interest in a petroleum development in the Republic of Congo.
  • Advised a petroleum company on the acquisition of upstream and midstream assets in Nigeria.
  • Advised an Austrian oil and gas company on the $115 million sale of two concessions in Tunisia.
  • Advised a Russian oil and gas company on a $410 million acquisition of interests in two petroleum blocks in northern Iraq.
  • Advised a UK renewable energy company on a series of acquisitions involving waste oil processing, anaerobic digestion, biodiesel production, and bulk liquid storage assets.
  • Advised an international energy and oilfield services company on amendments to loan and security documentation connected with the sale of shares in three joint venture subsidiaries.
  • Advised an international oilfield services company on the cessation of its operations in Russia.
  • Due diligence into a distressed Mongolian gold mining business.
  • Advised on an acquisition of mining assets in the Philippines and assisted the buyer in managing due diligence and pre-acquisition finance of the target, including a $16m loan and security over shares in the seller’s group companies.

Please note: The experience list above may include examples of work completed prior to joining Keystone Law.

Yulia qualified as a solicitor in 2015. Prior to joining Keystone Law in 2026, she worked at the following firms:

  •  Hunton Andrews Kurth
  •  Clyde & Co