well at £175/hour you might be best served going elsewhere - try tantricpleasure.co.uk - they tend to be at the raunchier end of the tantric massage spectrum, much has been written on here about the agency, for me they are my go to for a very sexual massage just £120/hour - if you want to indulge in kissing,fingering and RO its an extra £40 - on occasion I've paid the £120 and been allowed the previously mentioned but YMMV - I'd recommend Sakura, maggie, nancy or vanilla - comments have been made that the massage element can last around 45 mins, when/if you make a booking mention to the owner sophie that you would like the massage to last an hour - that may help.
Otherwise Eva's place in kensington is well reviewed by YLF and a few others with Jyoti and Uma being the standouts...I last went there a few years back and found it to be a professionally done authentic tantric massage...not as raunchy as tantricpleasure but good all the same...touching is limited though...I like my massage to be in-between massage and fs, with kissing etc...hope this helps