i second Evenflo pivot xpand. my babies are 16 months apart and i get so much use from my stroller!
Jolie tandem twin stroller folds up and contacts well and not too heavy. Comes with waterproof cover. Back os for newborn and onwards can pull back down so it's flat. I use for my 28 month and 5 month old. It's on argos I got for 170. Just an option hope it helps
Evenflo pivot xpand stroller not too pricy but also comes with an infant car seat