Summer 2018 Newsletter

Find out what Norfolk Wildlife Services has been up to over the Spring and Summer 2018. Read highlights of our projects and work in our 2018 summer newsletter, or alternatively you can select individual articles from the newsletter below.

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Keep in touch, if you need any advice or protected species surveys undertaken please contact us!

Hazardous tree inspection for TPO

NWS Aborist Jim Allitt recently advised on the management of a substantial oak tree subject to a Tree Preservation Order and within the Broads National Park.

Our client, Mr Coleman, had concerns over the extent of deadwood in the canopy, especially where it was close to his and a neighbouring property, but as also keen to retain it as a beautiful feature of his home.

Mr Coleman asked NWS to determine the condition of the tree and make future management recommendations. The tree was surveyed to look at issues such as weak unions or forks, cavities, and especially any defects hidden higher in the canopy.

Hazard tree feature – Branch failure

Sometimes hazards are obvious but subtler hazards may go unnoticed and mechanical failure may occur without specialist management.

Under the Occupiers’ Liability Act (1957 and 1984) the ‘occupier of the land’ where the tree is rooted has a duty of care to ‘take reasonable steps to prevent or minimise the risk of personal injury or damage to property’, both for visitors to the occupiers land (1057) and other persons (1984). The law is quite complicated.

To avoid or deal with risks while retaining the tree, a reasonable and balanced approach to future management requirements is needed, with a full understanding of calculated risk involved. In this case, NWS suggested a 2m, crown reduction and to clear larger deadwood from the canopy so that ‘sailing’ from the wind stressed the branch unions less.

Aerial tree inspection by Jim

Since the tree was protected, the works had to be agreed with the local planning authority, the Broads Authority. NWS’s successful application demonstrated that the works retained the screening the tree provided but were also necessary to reduce the risk the tree posed to the adjacent house and property.

Trees as assets : 7 rules for designing with trees

Trees on a site increase visual attractiveness, are great for wildlife and add considerably to property values. Maximising use of existing tree assets in designs will maximise the financial benefits for new developments. Here are NWS’s 7 tips:

  1. To maximise value from tree assets start at the concept stage; here a simple tree survey will suffice: a ‘Tree Constraints Plan’ with ‘Root Protection Areas’ (RPA).
  2. RPAs are minimum core areas to protect your trees; seek specialist advice if RPA conflicts with your design as to whether redesign is required.
  3. On sites with many trees, use BS5837 categorisation to prioritise the importance of individual trees, based on amenity, wildlife and landscape value.
  4. Allow room for future growth based on tree’s longevity; shading plans help design building orientation and fenestration.
  5. Allow for “hidden” issues for trees such as visibility splays, drainage (esp SUDS) and utility connection; trees with faults may need intervention to help them.
  6. An Arboricultural Impact Assessment (AIA) will help when instructing the contractor to protect trees plus organise site clearance, construction and final landscaping and planting.
  7. Find an arborist you can work with, seek their advice early and get their regular input.

If you are interested in how much your trees might add in value to your site, there are various techniques from the Capital Asset Value for Amenity Trees (CAVAT) through to ecosystem services calculations.

Jim calculates a tree’s RPA

 

Vattenfall partners NWS in best practice health and safety

Vattenfall is one on Europe’s leading generators of electricity and heat. Vattenfall pride themselves on their health and safety standards, protecting their people at work, and are committed to attaining high standards for the safety or employees and contractors.

They are also committed to working in strong partnerships that challenge themselves and their contractors to drive constant improvements in H&S standards.

For our 2018 ecological surveys, additional investment from Vattenfall has allowed NWS to apply new H&S observation systems and First Aid training, achieving a 100% First Aid certification rate for all field staff.

Chris Smith of NWS said ‘NWS is delighted to have received this additional commitment from Vattenfall for our surveyors in the field’.

Nicky in full transect PPE

  

Staff receive further certification

Every member of our ecology team now holds Construction Skills Certification, which cements our position as having the required training and qualifications to work safely as ecologists and arboriculturalists on construction sites.

The Construction Skills Certification Scheme (CSCS) is the national skills certification scheme for the UK construction industry. It covers skills such as health and safety legislation and hazard recognition.

It follows our accreditations by the Contractors Health and Safety Assessment and Constructionline in 2016 and 2017.