Hello,
Here is another Snowdonia plant I haven't been able to identify using Mr. Google.

It was also growing along the Devil's kitchen track. It had blue zygomorphic flowers with many hairs on the lower part of the corolla and what appeared to be a prominent nectar spur. The leaves were thick, succulent with entire margins. All the plants I saw only had single flower. It was nestled beneath a rock and slightly elevated above the surrounding ground.

The photo gives quite good detail on flower structure if you zoom in. Sorry for strange orientation of photo - I couldn't figure out how to rotate once uploaded.

Many thanks in advance