Living in Wester ross, I have not heard of Rainbows ousting the Browns at least on our waters, the nearest rainbow fishery is at Tarvie about 45 miles east of here, I know of no others , our club tried rainbows many years back, but they were gone in a couple of seasons, so any other stocking was done with Browns, we have a pike loch stocked there in Victorian times, so not Native, we have Minnows which were brought in by the Drop minnow "experts" and dumped at the end of the day , Ok we have these fish but should we protect them at the expense of truly Native species?, it's a can of worms Rob, we will be protecting Mink these seem to be coming Naturalised , should we? I just thought There is a new Rainbow fishery in Assynt using one of the local lochs , easgach 1