You asked

Could you please provide the statistics from Wigan and Warrington A&E from the year 2014-2015 and 2015-2016 that have dealt with any presentations of self harm? How many incidents of self harm did each A&E treat during the time frame? The average age of self harm presentations? What percentage were male? What percentage of self harm presentations were under 18? What percentage were over 18? If there is any decrease/increase in self harm presentations within the Warrington and Wigan A&E within 2014-2015 and 2015-2016, and what are they? Also, the average cost that one presentation of self harm costs an A&E service.

We said

Thank you for your request. The requested information is not held by the Office for National Statistics. Although unsure what information they hold, we suggest that you contact NHS Digital to see what they can provide.

http://digital.nhs.uk/home