I honestly do SBK. They've got their own complete legal department for a start, and the ability and funds to go as far as required. In terms of an LA's resources, this is peanuts. I've never yet heard of a council abandoning a legal action because it's run out of budget. If they think a case has political merit, or is in the public interest, they fight it all the way. Look at the chap who has ended up in the high court because the council isn't willing to accept the magistrates' decision regarding taking kids out of school - judicial reviews against the government with regard to HS2 etc. I make no comment on the merits of those cases, but they're an example of how councils regard legal action.
The last thing you want to do, in my opinion, is end up in court against a statutory authority - it's a bottomless pit of legal resources. SISU might be able to bully individuals and other organisations via the courts because the sheer cost is prohibitive, but it won't work against CCC I'm afraid. And every time SISU lose in court, costs are awarded against them remember - so the Council doesn't lose the full amount of their costs in any case.