Hazle I am absolutely whacked! E has decided that not only will she wake several times per night but now suddenly she also doesn't need as much sleep. She usually has about 10.5 hours at night and last night she decided she only needed 8 hours, meaning she went to bed at 8, spent 12.30-03.30 awake and then got up for the day at 7.
I thought she would be knackered this morning after less sleep, but no, woke happy as larry and stayed happy for her usual 3 hours until the first nap and then only napped for 45 mins instead of her usual 2+ hours. Moan, moan, moan. This child will be the death of me. 
Lol why does HV say to offer water at night? 60th centile is hardly problematic and at L's age it's not unusual to feed once or twice per night. This quote is taken from The Natural Child Project;
"Enforcing a strict routine when the baby may, in fact, be hungry, is similar to expecting an adult to adopt a strenuous exercise program accompanied by a reduced food intake. The result of expending energy (through crying/distress) while being deprived of food is likely to be weight loss and failure to thrive. Pediatrician William Sears has claimed that "babies who are 'trained' not to express their needs may appear to be docile, compliant or "good" babies. Yet, these babies could be depressed babies who are shutting down the expression of their needs."
I'm sure your HV is not suggesting you leave L to cry rather than offering food but it seems a strange thing to suggest.
Oh gawd, I haven't even thought about stair gates! We already have a gate in the hall to stop the dog eating the post while we are out so we will have gates everywhere! I guess we should also be thinking about a fire guard and those soft bumpers you put on furniture with sharp corners. I think I have seen the gates you mean Zombies. They look good but I bet they are quite expensive?