the conservatives have been accused of trying to stoke tensions, not least in other political parties. they say it's a point of principle. this is a complex and sensitive area that can involve balancing the rights of those involved, and it's already been proven this issue is not easy to navigate. tensions were brought to the fore when the scottish government tried to change the law to make it easier for people to change their legal sex, only to be blocked by uk ministers. now the tories say decisions on this issue should be taken in westminster — not something welcomed by the snp. it's just another example of undermining the powers of the scottish parliament. now, obviously i don't want to see that, because i believe we should have a parliament with the full range of powers to tackle all of the issues that affect the people of scotland. so, a policy change that's needed, or an issue being used as a political football? another point of contention in this campaign. alex forsyth, bbc news.