Flowering Cherry Dying

I have 2 flowering cherry trees in my garden both about 50 years old. Last year one of the branches on one appeared dead so I cut it down. This year yet more are dead and the blossom on the remaining appears to simply die. The other tree is perfect. Can anyone throw any light on my problem please?
I have loaded pictures to a webpage:
http://www.wilsoncowden.com/tree.html
Thank you
Wilson

 

sorry cant help with the question pathtowealth but WOW is that your garden?its beautiful.please post pictures when those roses come out. :D

 

Any signs of honey fungus? Look for black bootlaces in the soil round your tree and also for any mycellum under bark. You may also notice a very distinct mushroom type odour in the ground.

 

THanks for comments elainefiz - those roses are 54 year old and shoulld really be replaced - hold for a few photos in the summer.

 

Thank you "frogesque" I will look tomorrow (hopefully a dry day) & let you know. I also noticed another flowering cherry about 100 yds away the same as mine. One perfect & the other dying.