Location #1: 145 Piccadilly
33 Portland Place, London, England, United Kingdom
Location #2: Lionel’s home
89-96 Iliffe Street, London, England, United Kingdom
Location #3: Sandringham Estate
The real thing, Sandringham, Norfolk, England, United Kingdom
Location #4: Walk in the park
Regent’s Park, London, England, United Kingdom
Location #5: Garden Entrance — Prime Minister’s Office
At 10 Downing Street, London, England, United Kingdom
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Acourding to the Almost Ginger Website Location #7 is Lancaster House, London.