I've read the thread below about the OPs 16 month old not speaking but hoped you could help me too.
15moDD doesn't say anything consistently. She will say dadadadada and it's sometimes directed at daddy but often not. She babbles to herself as she plays and her comprehension is fine. If you ask her a simple task she'll do it. Or if you ask her to point to something she can. It's just the speech that seems behind.
Googling (which I know I shouldn't do!!) is bringing up mixed results. Admittedly a lot are American where they're saying their paediatrician got involved and referred to a speech therapist at this age but I'm not sure if it's worth contacting the health visitor and getting her assessed?
We're doing everything I've read about like talking in full sentences and asking her questions. Not giving in when she grunts at something is harder because it turns into a full blown tantrum quite quickly!