I have seen loads of light, summer suits in the high street recently, which ties in nicely with the pastel theme, although they aren't strictly for Spring. I've also included blazers on their own in this post, even though without trousers/a skirt/shorts they aren't really considered a suit...
Co-ord Fluid Blazer and Shorts - Topshop £95.00
Co-ord Fluid Blazer £60.00
Co-ord Fluid Shorts £35.00
Co-ord Pique Blazer and Shorts - Topshop £90.00
Co-ord Pique Blazer £55.00
Co-ord Pique Shorts £35.00
Black Stripe Ponte Jacket - River Island £45.00
Black Striped Trousers - River Island £30.00
Tangerine Boyfriend Blazer - Topshop £65.00
Light Orange Longline Blazer - River Island £55.00
Light Turquoise Longline Blazer - River Island £55.00
Lime Longline Blazer - River Island £50.00
It would be great if any international readers could comment below suggesting clothes websites that are more available to them. Because, although you can probably find most of the clothes I suggest elsewhere, I know some of the choices I pick aren't available to every country and I don't want to isolate anyone :) And if you can't or don't want to post a comment, email me at firstname.lastname@example.org, I'd love to hear from you!