Mr or Mrs?

This robin is one of a pair that were chasing each other in and out of the trees this morning. Normally I only see one a time, which I'm fairly sure is the male, and this one looks slightly different, so I'm guessing it's the female. However, male and female robins are very difficult to tell apart, so I could well be wrong!
Anyway, it's nice to be back blipping again. We have both been laid low in our house by the heat for the last couple of weeks, so it's good to be feeling more lively with the fresher air, and rain, arriving.