Simonb wrote:

But the template is correct. The text body contains the error.

The BBC corrected the missing apostrophe ("Tuesdays Weather" [sic]) in their
previous incarnation of the weather forecasts on BBCi in response to an
email from yours truly, and presumably in response to the squeals of many
other irate pedants. That error must have been templated so if the BBC can
do it, I'm sure the Met Office can.