Ask HN: accountant recommendation in (north) London?

As a self-employed, I've been doing my taxes on my own for the past year; however, recently contracting seems to be booming, so it would really make a difference to make this tax-efficient. Particular painpoints are evaluating whether on the basis of getting paid via dividends from a shell corp would be most tax-efficient if routed through an LTD to me, or via self-employment; for this, I need an accountant who's 1, generalist enough to know these trade-offs; and 2, will not try to auto-upsell me through incorporation costs for better commission.

So, here I turn to the nice community of HN: how would you find an honest accountant, preferably located in North London?

Personal recommendations are also welcome.