Lease Clause Drafting Tips

Certainly, here's a draft for the clauses you requested:
Rent Review Clause:
"The annual rent shall be reviewed on each anniversary of the lease commencement date. The review shall reflect changes in the Consumer Price Index (CPI) or Retail Price Index (RPI) as published by the Office for National Statistics. If the index increases, the rent shall be adjusted proportionally; however, the rent shall not decrease."
Service and Heating Charges Clause:
"The Tenant shall pay a proportion of the service and heating charges based on the Landlord's budget for the property. These charges shall be reviewed annually and adjusted based on the actual expenditures incurred by the Landlord. Any excess or shortfall shall be reconciled at the end of each financial year."
It's advisable to have these clauses reviewed by a legal professional to ensure they meet your specific needs and comply with applicable laws.

To add these clauses to your lease document, consider placing them in the following sections:
- Rent Review Clause: Add this under "Tenant Covenants," specifically in section *.*, which relates to rents. This is where you address rental payments and conditions.
- Service and Heating Charges Clause: Incorporate this within section *.* as well, as it directly relates to tenant obligations regarding service and heating charges.
You may want to consult with a legal professional to ensure proper placement and integration of these clauses into your lease document.