The principal legal challenge is that many leases do not provide for solar PV installations. Usually, the installation of solar panels will be regulated in the lease under the alterations clause, where the landlord’s consent is likely to be required for any changes to the property, particularly to the exterior. As set out in Jessi’s Property Week article, landlords must carefully navigate the potential pitfalls associated with granting consent for solar panel installations and the legal, financial and practical considerations involved. Where the terms of a lease do not permit such installation then lease terms can be renegotiated but this can be a lengthy process - it relies on cooperation between all parties and will inevitably come at cost. There may be leverage for occupiers in pursuing a seldom‑used statutory process under the Landlord and Tenant Act 1927 relating to improvements. In certain circumstances, this can assist by implying qualified consent not to be unreasonably withheld. However, there is a notice procedure to be followed, and the procedural hoops to jump through mean that this route is rarely used in practice. Landlords will understandably be cautious where a rooftop solar scheme involves the tenant entering into a power purchase agreement (PPA) and granting a sub‑lease or lease of rights to an independent power producer. Such documents confer proprietary and contractual rights over the solar infrastructure and parts of the property on a third party, raising concerns about how they interact with the tenant’s lease covenants and what happens if the solar lease or rights outlast the occupational lease. This can constrain flexibility to use the roof, undertake works or redevelop. Even where panels are installed without a third-party provider, landlords will still need clarity on allocation of maintenance obligations, access arrangements, insurance, reinstatement requirements and end‑of‑term decommissioning.