Coinsbankis a reputable UK based exchange that was established by CB exchange LP and licensed in Belize. The exchange started operation since 2016 and it is still in actively in operation.
The exchange has many flat currencies on its platform which I believe contributed largely to it's high liquidity coupled with the fact that it supports two major cryptos ethereum and Bitcoin.
It is a security tight exchange. Itvemploys many security architecture. These includes SSL encryption, Email verification, two factor authentication and it secures all funds in cold storage.
However, this exchange charge too many fee and the fees are even above industrial standard. It charges 0.5% per trade on makers and takers and also require that traders pay 0.01% on all deposits and withdrawals.