never heard of them.
Looks like a 'trading exchange' which is the business model tried by others. Works for sports with Cantor but Binexx failed miserably with financials (now using normal SB model under family Ctiyindex umbrella). Problem is liquidity for financial binaries, you need constant prices therefore it will only work if they allow some traders to link in their price models direct to the exchange.
I've just looked at the FTSE and DAX prices, nothing there.
Also pricing in Dollars will put many off in the UK.