6m/10m tropo with WSPR

On a few occasions recently I've had some spots at surprising distances within the UK by what I am sure is tropo on 6m and 10m WSPR. Just a few moments ago I got a -27dB S/N report from G0MGX in IO93ga at 145km with my 5W to the vertical on 6m. It is for this sort of surprise result that I find WSPR so good: when one least expects a report you get one.