It's called Disability Living Allowance. The highest rate of the care element plus the lower rate of the mobility element come to £186.30 each 2 weeks. It's possible the extra is due to the annual increase in rates which applies from start of April. Otherwise, it must be something different - not DLA at all.
It is not correct that alcoholics get more.
The extra will not be a winter fuel payment - that is either a much larger one off sum for pensioners or a smaller sum paid only during weeks of exceptionally cold weather.