UPDATE since my last post: I did indeed contact Camden and Leaseholder Services – as well as my MP. It appears that Florrie’s Law did have some application in my case – even if only because a member of council staff informed me that the cap would apply, citing Florrie’s Law. Camden has since withdrawn the invoice. What a relief.
I am very glad that I emailed Camden in the Spring to confirm what my final costs would be; that I remembered their answer; and that I queried the invoice. What a relief. It can often feel like we have no influence over what the council does, but in this case they had a record of the email exchange (ALWAYS get it in writing!) and stood by their promise to me in that exchange.
I am not sure how this will help leaseholders receiving estimates for upcoming work; but maybe it will help anyone receiving additional ‘final invoices’ which exceed the £15k cap. It is also a reminder to keep in touch with Camden, and to ask for as much information as possible at each stage.