Membership form for 2020. If you are an Income Tax payer please tick the gift aid box as every little bit helps. Download Observation Hive Risk Assessment document. Members currently come from a rough circle 25km (15miles) radius of Sleaford, but anyone can join. Open Apiaries (Usually members only) Open Apiaries for 2018. Equipment Hire (members only) List of equipment available for SBKA members to hire and availability calendar.