An urgent dangerous drugs warning has been issued over ecstasy tablets said to be in circulation across Greater Manchester.
The yellow-coloured tablets are embossed with the letter B, said to stand for 'Bitcoin'.
Experts have said tests have shown they contain a 'variable type and content' of dangerous 'psychoactive drugs' including 4-Chloromethcathinone, or 4-CMC, which has reportedly been previously mis-sold across the city region as MDMA.