As part of the Equality Act (2010) the University has to ensure that it puts in place reasonable adjustments for students with disabilities. Examples of these include extensions to coursework deadlines and additional time in exams. In some universities the use of considerate marking is included as one of the reasonable adjustments that is applied to students with particular impairments (e.g. dyslexia, dyspraxia, dyscalculia, attention deficit disorder). Other universities work on the basis that all appropriate reasonable adjustments have been taken into account prior to submitting an assignment, and that all assignments are marked to the same standard and against the same criteria.
There are advantages and disadvantages of considerate marking.
Summaries and analysis will follow from the feedback you have given.