Balancing the political books

The Electoral Commission has published the latest accounts of political parties. The DUP, UUP and Alliance all report deficits for the year of £50,000, £450,000 and £40,000 respectively. The SDLP and Sinn Fein reported a surplus. Only the DUP and Alliance report their membership level.The individual accounts are here:
Alliance
DUP
SDLP
Sinn Fein
UUP