I can't speak to whether Theresa May is trustworthy or not (I suspect not) but I her necklace is NOT A PEDO SYMBOL. General spirals are not symbol for pedophilia.
upward pointing triangles = male
Blue triangles = gay male
blue triangle inside another or in spiral form = Man/boy pedophillia
Heart within a heart is for girl pedophnillia
Not every symbol pans out to be purposeful but these are pretty reliable. I have yet to see a basic spiral mean pedophilia. Its a hugely common to find spirals in design.