Weather forecasts:
Met Office: https://www.metoffice.gov.uk/weather/specialist-forecasts/mountain
Mountain Weather Information Service (MWIS): https://www.mwis.org.uk/
Meteoblue (useful for overseas trips): https://www.meteoblue.com
Bird restrictions:
The Lakes and surrounding areas: https://www.frcc.co.uk/bird-restrictions/
Wild Places 