Obs anaesthetist
We generally won't do epidurals for metal work as the risk of introducing metal work infection that would be awful as may require all the metal work removing
Some trusts, providing the metal doesn't go higher, will do spinals for theatre (forceps or csection) - but they'd need to see your xrays as we do them at l3/4 level (2nd choice being l4/5) as the risk of infection is lower with a single injection vs plastic tube in the back for hours. We are super careful on checking the block as the metal work can affect the spread of the anaesthetic drug
Some anaesthetists are super cautious and would only offer ga sections (and if a spinal didn't work would be a ga conversion)
For labour you'd have the standard gas and air, an injection of either pethidine or diamorphine (do similar some trusts offer one or the other)
The other best option for spinal metal work providing you meet criteria (bmi <40, not got not twins, not premature or fetal abnormalities etc) then would be a remifentanil pca so a clicky button device that you press with contractions and gives high dose iv opiate that is v short lasting.
You need to check early on whether your labour ward offers this and if they do it commonly as some places do it all the time and it's easy to arrange. Others rarely do and it's hard to get, a some don't offer fullstop as it needs Specialist midwifery training and it's higher from a work load perspective as the midwife can never leave your room
So I'd phone around and ask to deliver somewhere familiar with remi that use it a lot
If you go on labourpains.org that's written by obs anaesthetists and gives you loads of different info on the options I've said above, and you'll be phoned by one of us in late pregnancy to discuss all this in advance
Best of luck