Thanks Brian and Ecca

Ecca: I tuned it before I started playing so think it might still be a bit of a problem with my technique where I accidentally bend the strings a bit . I catch myself doing that sometimes - although it would be nice if it were the tuning and not me.

When I get a bit more confident I'll tighten the trem bar but at the moment it sort of gets in the way if it's too tight and throws me a bit like the different trem bar of the Mexican Strat also does until I get used to it.
All the best and thanks again

Rosemary