We had our baby at King’s last May, and are also based in FH. I can only speak to that and not Lewisham, but our experience at King’s was very good.
Prenatal care was good, although bear in mind if you’re FH based you’ll likely be classed as ‘out of area’ - this means you go to a different midwifery unit (still on King’s campus but not as salubrious as the main centre!). The scans etc at the Kings Fetal Medicine Research Centre were top, top class.
My wife had a long labour which ended in a C-section, so we were there a while(!) and had several midwives, but they were all fantastic - and really took note of our preferences and birth plan etc. Consultants and anaesthetists, all were great.
Bub had to spend a couple of days in SCBU while we stayed in the ward, which wasn’t the best experience, but there wasn’t much more they could have done to make us more comfortable. Main issue was the ward being on a different floor to SCBU so I had to wheel Mum up and down in the lifts a lot.
We were worried that as ‘out of area’ patients at Kings that our notes etc would be lost when transferred back to Lewisham, who will take on your aftercare and home visits, but this was a smooth transition and all histories/notes passed through correctly.
Worth noting there’s little on offer for partners at Kings - lots of floor/chair sleeping. The M&S onsite was a godsend so I could eat. But this is the general rule across most hospitals I think!
Hope this is helpful - happy to answer any specific questions. Best of luck!