This number has been calling some Irish folk and its one to avoid,it will either call you and hang up and for some they will ring back,this is a premium number and will just eat your credit,if you see this number just ignore it and add to your block list if your device allows to do so,you can also request your provider to block the number,it seems to be originating in London which cross checks with Tellows number search..
Alternatively you can use apps to block numbers too which can be got from the respective app stores..
These particular calls are not really new but its important to keep up with the numbers and pass on the info,there is people that are vulnerable and being a UK number anyone with relatives or friends,perhaps even work could easily fall for it…This number is still active and when you call it you get some really crappy music to listen to..