This is an interesting discussion - probably wider than the op intended though.
I have not stuck to all the guidelines with my children and they have all been entirely different in their first years - regarding sleeping through and weaning.
Ds1 - bf, frequent waker, follwed 91st %ile throughout in weight, was never interested in solids and took months to get into 3 meals a day. So I continued to feed on demand for as long as it took, frustrated my HV as I had no idea of exact times and frequency of feeds! But as we co-slept I was able to pick up feeding cues and therefore not much crying at night unless ds was ill. We began co-sleeping because we had a bedside cot and one bed flat but we continued because it worked for us.
DD1 - bf very big baby and frequent feeder/ waker at night but easy peasy to wean at 6 months however she continued to feed at night till she was 2 (very infrequent by then), she stopped bf at 2 1/4.
DD2 - bf she is now 13 months and I am feeding her right now - she has 3 meals a day but still bf 3 or 4 times a day and at night especially when teething which she is right now.
I never consider cutting out night feeds till they are in their own rooms at btwn 18 - 24 months - that is the plan for dd2 - I hope that it will work out as it did with the other 2! Dd2 ha never been one to cry much - when she was born she didn't cry causing concern for dh and I at the time - but she just didn't need to (placed straight on my chest and occupied with finding the milk!) - and I have determined to keep it that way by anticipating her needs - largely succesfully,night feeds are part of that process.
To be honest I will miss that night time closeness (though not being used to soothe aching gums!) when it ends in a few months as I can see the end of my breastfeeding years approaching!
I no longer speak to HV about what I should or shouldn't do.