One relatively new band I am quite keen on is Brighton’s, Polymath.
Their Biography reads:
Polymath make densely layered, off kilter instrumental Math-Rock that leans on the heavier elements of the genre reminiscent of early Battles, The Mars Volta, and ASIWYFA. Polymath seek out new levels of complexity in their music whilst never straying too far from a neatly arranged composition.
I highly suggest checking them out and giving their current kickstarter a look:
Expect them to be featured in an up-coming Scotch On The Rock, as well.
You can find them elsewheres: