I'm afraid I don't have any information about the actual party membership of the existing parties. I suspect that they continue to decrease, as they have been. Although other factors came in when one of the major parties decided to have an election for the leadership of the membership. That did increase.
I think probably, where there were increases in membership, it would have been for smaller parties that up until then didn't have much of a realistic opportunity of being in Parliament. Suddenly, people who supported those parties thought it was worthwhile getting involved and joining up. I suspect that smaller parties saw an increase in their membership as a result.
On the fundraising, I guess equally, the amount of money that people were making as donations was going to more parties because there was a more realistic chance of them being in the House.