Hi Wrensong  and Decogirl50.
Thanks for your replies.
I held off reporting back until a little time had passed and I could gauge how my tissues were responding to the V.E.
I commenced with two weeks loading of Ovestin 0.5g per day.  All went well.  I followed CLKDs advice with the brush for cleaning the applicator.  I found the brush for straw cleaning was the best fit.
I noticed during loading that my nipples became a little tender for a brief period, but my hot flushes continued, so obviously not too much systemically.
After the loading period and for convenience, I decided to try the Vagifem pessaries twice per week, and have been using them for the last 4 weeks.  They are so much easier, and no concerns with applicator hygiene.  
In addition and with the same frequency, I have been applying a tiny dab of Ovestin to the fourchette, because I had repeated tears there.
Thus far I have been really pleased with my feeling of vaginal comfort.  I also obtained Sylk gel, but have not used it.
My nipple sensitivity stopped after the Ovestin loading period, but I have noticed that my hot flushes have very recently ceased.  This worries me slightly because it could be indicative of some systemic oestrogen circulation.
For ease of use, I prefer the Vagifem, but in view of the hot flushes ceasing, (could be coincidental) I am now wondering if I should switch back to the weaker Ovestin.  I have just been giving thought to this today.
Most positively, and one of the main reasons I considered taking the V.E, urine dipstick testing has been showing no leucocytes in my urine over the past week.  This is a first.  I have had very high levels of leucocytes for about 2 years.  They would abate briefly following antibiotics, but then return.  I am keeping my fingers crossed that they and UTIs will not return.
I would add that I am also taking a daily quality probiotic and cranberry capsule, so I may be muddying the water a little as to which is doing the trick.  
Ann x