OXFORD, ENGLAND - MARCH 27: King Charles III speaks with a staff member during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III (second right) speaks with a staff member during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III (second right) speaks with a staff member during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III (second right) speaks with a staff member during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III shakes hands with a staff member during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III speaks with staff members during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III speaks with staff members during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)

OXFORD, ENGLAND - MARCH 27: King Charles III laughs as he speaks with staff members during a visit to Oxford PV, a globally-recognised pioneer of solar technology on March 27, 2026 in Oxford, England. (Photo by Kate Green/Getty Images)