Tomatoes feel soft

Can anyone help please?   The tomatoes in my greenhouse which are just starting to ripen feel soft inside, as if they have gone a bit off!   The same thing has happened to some cherry ones I had outside, two were ripe so I tried them.  They seemed mushy inside with a very tough skin.   I have never had this before, does anyone know what has caused this?  Your help would be appreciated.

What a strange year it has been, well for me anyway 

Hello momofstig, thank you for reply.   I have always grown these varieties and these are last years seeds and I did not have the tough skin problem!   Do you think the softness inside is because of  the time taken to ripen?