Startup board meetings in the UK: how often should they happen and what should they cover?

I was reading about startup board meetings the other day and wanted to check I have understood it properly, because most of what I find is either written for large listed companies or is a generic agenda template with no context. Here is what I have pieced together, and I would appreciate anyone correcting me.

Board meetings seem to be where a company's directors make formal decisions, review performance and keep a record of how the business is being run. At the earliest stage, with just the founders, they can look quite informal, but once outside investors come in, the cadence and structure usually become more defined. Many startups appear to hold them monthly or quarterly, with a board circulate packed a few days before covering financials, cash and runway, key metrics, hiring, risks and any decisions that need approval.

The legal side is where I get unsure. As I understand it, UK directors have duties under the Companies Act 2006, such as promoting the success of the company and exercising reasonable care, and certain decisions need to be recorded in minutes or passed by written resolution. The articles of association and any shareholders' agreement may also set out what needs board or investor consent, such as issuing new shares, taking on debt or changing the option pool. I also keep seeing mentions of observer seats, investor directors and independent chairs, and I am not sure when it makes sense to add them, or how much influence they should have in a small team.

My question is how founders decide how often to meet and what a useful board pack actually looks like at seed stage. I would also like to know how people handle disagreements with investor directors, who should take minutes, and whether a poorly kept record ever came up during due diligence in a later raise. I have read something similar to this on Entrepreneur Plus , so I would like to hear from anyone who has run a board, what they found hardest, and what they would do differently.