My experience of vapourisation was that the engine did not cut out so much as run badly; coughing and spluttering, and could be kept going by revving, (for a time,) letting it cool down it would restart and run better for a few minutes, then symptoms would start again.
I find it difficult to imagine that it would be so bad in the cool weather we are having in UK at the moment.
You say you have electric fuel pump? With vapourisation, you would hear it running constantly, at full speed, as it tries to pump vapour. Can you hear this?