Spuds and Raspberries

In Spring we put 3 spare kestrel spuds in Plot 8A, alongside the raspberries. Anyway, we've been pulling them over the last couple of weeks - they're pretty scabby, especially compared to the lovely-looking spuds we've been getting from Plot 7 - they taste and cook fine though. The plant closest to the raspberries grew much slower than the others and looked a bit different, but we pulled it yesterday and it was a kestrel.
It seems that potatoes and raspberries are not good growing partners. The raspberries are certainly happy (Dave took a punnet-ful away today) but the potatoes only produced about 4-5 tubers and are quite uneven shapes and scabby.
We won't put them in there next year and will move the raspberries and get them under control now we know they're mainly Autumn fruiting varieties. The roots have got everywhere and are spreading to path and neighbouring plot so we'll pull them and transplant just a few canes - probably in December/January. Autumn varieties can be chopped right back and then will fruit in the same year, so they should be fine....