Charlie Pridham wrote:

It may be a bit cold for the pandorea (My fil used to live on the
Brown Clee hills) and there is an all white flowered form (lady Di I
think) and the straight species is white flowered with a pink eye.
If you want yellow flowers try looking at macfadyena unguis-cati or
Hibbertia scandens, both will take a few degrees of frost as will
Pandorea pandorana Golden Showers

I've had Macfadyena unguis-cati growing in a greenhouse for years (it also
grows happily outside on a south wall). But it has never flowered, despite
being a rampant grower; references often state that it needs a hotter summer
than our climate provides to flower successfully. Maybe your experience is
different.

--
Jeff
(cut "thetape" to reply)