About
At Leon Advisers, we aim to make business owners’ lives easier by providing fast, accessible, and expert accounting services. Founded by Ali Ihsan Sirti, we are licensed by AAT and committed to delivering personalised support to clients in the UK and beyond.
Our services support businesses and individuals across the UK, as well as non-residents with UK interests, such as non-resident landlords, import/export companies, e-commerce businesses, or those residing outside the UK but intending to start a business in the UK.
We understand some of the biggest challenges in the accounting industry: lack of expertise, slow response times, and lengthy processes. At Leon Advisers, we tackle these issues by offering proactive support beyond the typical 9-to-5, ensuring that all your questions are answered by a qualified accountant.
A Message from the Principal
“Having worked with clients across various industries for years, we’ve developed a deep understanding of what matters most in the accounting industry:
- Continuous learning to stay ahead of ever-changing regulations.
- Time sensitivity to ensure clients can focus on their goals.
- Strong client relationships to build trust and deliver tailored solutions.
We don’t rely solely on years of experience to define our expertise. Instead, we pride ourselves on being constant learners, adapting to changes in the industry, and always striving to provide the best possible service.
Building strong partnerships with our clients is our top priority. We’re here to go the extra mile, offering seven-day support to keep your business moving forward.”
Ali Ihsan Sirti, Principal
Why Leon Advisers?
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Other Professional Services
UK Visa and Immigration Advisory
In addition to accounting services, we also provide expert UK visa and immigration advisory services. Our in-house OISC-regulated immigration advisers are qualified to represent clients on a wide range of UK visa applications.
Our Credentials
We are licensed by the Association of Accounting Technicians (AAT) under licence number 1008201. Additionally, we are registered with the Information Commissioner’s Office (ICO) for GDPR compliance under reference number ZB327264. Leon Advisers is the trading name of Leon Accountants Limited, which is registered with Companies House under registration number 14030889.
