Well my emails have received the same vague 'copy and paste' replies as Cherrie got.
But I did email Hopkins and their reply was more promising, i think ...
"Thank you for contacting TOEIC Philippines
We would like to inform you that only TOEIC scores acquired on test dates starting from April 6, 2014 and beyond can no longer be used for UK visa purposes.
Since your wife had taken the test prior to the said date it will still be accepted by the UK Border Agency."
So it means I can still use my TOEIC certificate I took in November last year for my visa application? Woohooo!