Hi, it probably is Hardenbergia violacea, although it's common name is purple coral pea, the flowers can be white, pink, or lilac, or it could be the cultivar 'White Crystal', Derek.

Wow Derek - you know more than the Hayloft staff then! I'm really glad to hear this is a climber, and it is pretty too. Many thanks.

Thank you Sheila, you're very welcome, Derek.

Hi Sheila, I forgot to mention, this is only half hardy, so will need some winter protection, Derek.

Here in Arizona, the white kind is only hardy down to -4º C.

Thank you Tug, I’ll bear that in mind.