"Create a high-resolution, photo-realistic banner image for a UK sports betting blog. The image should be 1800px wide by 1200px high and feature a colorful, eye-catching composition. Include elements of horse racing, football, greyhound racing, and casino betting. Integrate Betfair branding subtly within the scene. The image should be vibrant and dynamic, capturing the excitement and energy of sports betting. Use real-life imagery and avoid any unrealistic or artificial elements."