Mature British returnee seeking accommadation

About me:
I am a 69 year-old British national, single, non-smoker, recently returned to London after thirty-six years living and working in Japan. I maintain a quiet, orderly and respectful lifestyle, with no pets and no vehicle, relying entirely on public transport.

Accommodation Requirements:
I am seeking a clean, well-maintained room. I am looking for an initial stay of 1 to 3 months, with the potential to extend further subject to mutual agreement.

Financial & Referencing:
Full British citizenship (UK Passport available for right to rent verification).
Non-smoker, no car, single occupancy.
Prepared to pay rent upfront in advance to ensure a straightforward and secure agreement for the host.
Please feel free to contact me if you have a suitable room available or require any further details.