Conditionals seem to be a pretty basic unit of grammar, but this sentence nevertheless got me stuck:
The experts were felt to have little hope of reducing the differences, even if an attempt were made to bring the two parties together.
The use of were seems incorrect here, doesn't it? Given that the sentence is in the past tense, the unreal conditional should read
...an attempt had been made...
If the real conditional is implied, was is required, since, to the best of my knowledge, the use of were with a singular 3rd person is restricted solely to unreal conditionals. I have also come across the were to have been construction, but that doesn't seem to apply in this case.
So, in summation, is it just me, or is the sentence incorrect? I'll be truly grateful for an answer.