The Duchess of Cambridge will officially open a new Art Room at a school in Ealing.
Her Royal Highness is a patron of the ICAP Art Room charity and will meet staff and pupils at the Northolt High School later.
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Led by Quo frontman Francis Rossi, Parfitt's band mate for 50 years, the group's current line-up joined mourners at Woking Crematorium.
Currently the Ealing Council has a huge shortage of suitable space and sees these steel well insulated boxes as a cheaper alternative.
Staff at Envirowaste in Leyton say the medal may have been left within a piece of furniture and thrown away accidentally.