You have the right to request the birth you want but you have to have a good reason for it. Being able to plan the date for childcare mightn't be enough say but a deathly anxiety that will be mitigated by having a planned date might. They prefer vaginal.
I talked with a midwife sonographer about it the other day in a hypothetical way. She said, in most cases, vaginal is better for a baby with no issues as they benefit from coming through the birth canal, clearing them out of fluids and getting good bacteria/immunity something or other, also less shock. It's better for mum as the recovery is much easier and you can manage baby easier in terms of lifting etc.
The benefits of having one depend on the reasons its being considered. For me it was because if breech in which case it would be safer than vaginal.
I got
these which are enormous but have great reviews and were recommended to me as well as Aldi inco pants (and Aldi nappies for baby, Which's best buy). Tena will send you a free pants sample if you fill in the form on their website.
Also have one of these
fans and a magicool spray - don't know if I'll need it but again, have been recommended.
Portable "bidet" from amazon too - basically a water bottle to spray your bits at the same time as having a wee so it's diluted and stings less apparently.