K - Preliminary Arborist Report (29.08.2019)

              APPENDIX TWO: tree categorisation (BS5837-2012)


              The purpose of the tree categorisation method is to identify the quality and value (in a non-fiscal sense) of an existing
              tree, allowing informed decisions to be made concerning which trees should be removed or retained in the event of
              development occurring.




              Trees unsuitable for retention Category U: Those in such a condition that they cannot realistically be retained as living
              trees in the context of the current land use for longer than 10 years


                       o    trees that have a serious, irremediable, structural defect, such that their early loss is expected due to
                            collapse, including those that will become unviable after removal of other category U trees (e.g. where, for
                            whatever reason, the loss of companion shelter cannot be mitigated by pruning);
                       o    trees that are dead or are showing signs of significant, immediate, and irreversible overall decline; and
                       o    trees infected with pathogens of significance to the health and/or safety of other trees nearby, or very low-
                            quality trees suppressing adjacent trees of better quality


              NOTE: Category U trees can have existing or potential conservation value which it might be desirable to preserve.




TREE TO BE                     MAINLY ARBORICILTURAL QUALITIES                    MAINLY LANDSCAPE QUALITIES                       MAINLY CULTURAL VALUES
CONSIDERED FOR                                                                                                                     INCLUDING CONSERVATION
RETENTION
Category A – Trees of          Trees that are particularly good examples of       Trees, groups or woodlands of particular         Trees, groups or woodlands of significant
high quality with an           their species, especially if rare or unusual; or   visual importance as arboricultural and/or       conservation, historical, commemorative or
estimated remaining life       those that are essential components of groups or   landscape features                               other value (e.g. veteran trees or wood-
expectancy of at least 40      formal or semi-formal arboricultural features                                                       pasture)
years                          (e.g. the dominant and/or principal trees within
                               an avenue)




Category B – Trees of          Trees that might be included in category A, but    Trees present in numbers, usually growing as     Trees with material conservation or other
moderate quality with an       are downgraded because of impaired condition       groups or woodlands, such that they attract      cultural value
estimated remaining life       (e.g. presence of significant though remediable    a higher collective rating than they might as
expectancy of at least 20      defects, including unsympathetic past              individuals; or trees occurring as collectives
years                          management and storm damage), such that they       but situated so as to make little visual
                               are unlikely to be suitable for retention for      contribution to the wider locality
                               beyond 40 years; or trees lacking the special
                               quality necessary to merit the category A
                               designation




Category C -Trees of low       Unremarkable trees of very limited merit or such   Trees present in groups or woodlands, but        Trees with no material conservation or
quality with an estimated      impaired condition that they do not qualify in     without this conferring on them significantly    other culture values
remaining life expectancy      higher categories                                  greater collective landscape value; and/or
of at least 10 years, or                                                          trees offering low or only
young trees with a stem                                                           temporary/transient landscape benefits
diameter below 150mm
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              PAR: V2
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