Hi Two Sheds. We got a modular sofa from Nabru
Nabru Furniture | Corner Sofas and Sofa Beds and they deliver. Ours cost £870 ish, seats 6 and includes a sofa bed and under seat storage in the short arm of the L. You basically design your own sofa and they have online software you can play with. There is a choice of fabrics, arms, seat sizes etc. Everyone loves our sofa even my folks. I can send you a photo if you like.