I used a set-up just off Bayswater road for notarisation ans then weakened and let them do the whole thing as I was quite busy. Cost breakdown was £60 + Vat for notarisation (they needed passport and also a utility bill to prove address) £ 80 + Vat for courrier to Foreign and commonwealth office and Egyptian Embassy. Stamp charges for Commonwealth office and Egyptian embassy £ 20 + £27 so total £ 211.50.
For anyone interested in London area Notaries were Soni & Co in Inverness Mews, they are also in Staines, Gants Hill and Fenchurch Street.
London Notaries - Legal Services - Translation Services - Soni & Co Notaries They seem to be set up for this kind of work. Will take two days.
So if you are prepared to run around yourself you save £ 80 + Vat with these ones but I thought of the waiting time fares/parking fines and paid!
Iain