The UK has 48 English, 32 Scottish and 22 Welsh Counties, so 102, giving an upper house of 204, which would seem to be sufficient.
204 working members would be spot on.
And the election cycle being disconnected from the lower house would be good. 6 years is a good term. We might consider making it 8 so that there is some medium term thinking rather than "just getting to the next election".
