Seeking reliable dog-sitting care for a friendly retriever

I’m looking for a trustworthy dog-sitter to take care of my friendly retriever while I’m at work. The dog is well-behaved, fully house-trained, and enjoys short daily walks around the neighborhood. I’d like someone who can drop by in the morning to feed and check on him, plus a midday walk, and a brief evening visit if possible. The ideal caregiver will have experience with large dogs, be comfortable with a fenced yard, and provide updates with photos or quick messages during the day. Preference for someone who can accommodate a random one- or two-week period in the coming month. We’re in central London, close to public transport, and would appreciate a short meet-and-greet beforehand.