Essex,
United Kingdom 
What is wrong with my Azalea?
9 Jul, 2016
Answers
Looks like lack of water to me.
9 Jul, 2016
Ditto on the query re a drainage hole and another question - how long's it been in that pot?
9 Jul, 2016
It also looks like soil has been added to the pot recently. Azaleas are sensitive to being planted too deep.
9 Jul, 2016
Previous question
Is there a drainage hole in the pot?
9 Jul, 2016