Hello - if anyone can provide any experiences or advice on London agencies, please post here. Thank you!

Just type in London in the search feature.

I was in London 2 years ago.  Both of the agencies I used are very much still in business.  
Pasha  link.  Saw Hailey.  Most beautiful woman, I've ever met.

http://www.pasha.co.uk/

Hamiltons.  Link.  Saw Paris.  She isn't listed anymore.  UTR, I believe.

http://www.hamiltonsescorts.com/

You might try this site, Punterlink.  is a good escort directory site.
Be prepaired, for 'Sticker' shock.  Avg. rate is GBP 200-350/hr.  1 GBP = 1.64 USD.
Good luck, and hoist a pint for me.

Understood. I would likely use an agency though due to time constraints and want to know if there are a couple that are particularly reputable. The main thing to me is that their website is accurate (pics & service descriptions). Thanks