Welcome! Sorry, no helpful information re Whittington, although unfortunately a friend gave birth there (birth fine, aftercare not).
Can I strongly suggest that you find out about the single room situation there, like now? A lot of NHS hospitals which mostly do wards also have amenity rooms, which are basically singles they offer to mums in greatest need? Ask for one as soon as you get to the ward, even if you're not sure if you need one. I vaguely intended to 'see how I felt' when I got to my ward, and the answer was - fine, until I got about 5 mins sleep in 48 hours due to consecutive baby wails through the night. My sister had an even worse time - not just baby wails but TV throughout the night (at least my hospital switched all TV off centrally at 9pm). Single rooms make a serious difference to how you feel IMO. If you can afford them - I'm horrified to see the cost at the Whittington.
I note that they think they 'may' have private rooms available in a new unit. If you have even more spare cash, try to find out if this has happened, then you can actually book one in advance.
The only other thing I wish I had done to improve aftercare was to put all the breastfeeding support line information - NCT, Association of Breastfeeding Mothers, La Leche League, local bf counsellor - onto a credit-card-sized piece of card and put it in my purse so I had it to hand in the early days.
Then relax and enjoy your pregnancy