So true.
I used Heidy as well just last week. Her hair was fine and did look like extensions but the real problem was her breast implants and she didnt let me play with the boobies as her nipples were quite sensitive to the pain after the surgery.
Havent used angelika though. How was she?
Some other recommendations for you which I have tried:
supreme69.com/london-escorts/posh.html (My bad luck was that I was her last client that night and she had her hair in a braid and didnt let me open the braid. 
)
vixens-london-escorts.co.uk/escort/Kayla__london_escort_608.html (Again my bad luck here was that she had her hair in a high pony tail and didnt let me open it as she was expecting a treatment the next day but promised that she will let me play with it the next time).
Any more recommendations in the same budget range? Do reply here and I will send you an email with my email addy. Perhaps we can share thoughts and finds and team up as long hair lovers (just for information sharing though and not MMF )
Really want to try these though:
escortlondongirls.com/jasmin.htm
escortlondongirls.com/jordan.htm
The one below seems like my dream come true but she didnt pay me a visit as i didnt have a land line phone at my place (one of her security related requirements for out-calls) however, i do plan to visit her for an in-call.
I have a couple more short-listed so will share soon. Do also share your views.