There is a whole category on Ikea of folding dining chairs: http://www.ikea.com/gb/en/products/chairs-stools-benches/cha...

Central London rental property is beyond ridiculous [1] (that's partly why I left). If you choose to live there, it's unreasonable to compare it to anywhere else -- except Hong Kong, Singapore, etc.

[1] https://www.gumtree.com/p/property-to-rent/nice-single-studi...