General Digital Skills
Lloyds Bank Business Toolbox - Useful Online Tools for businesses (free for 30 days).
Digital Business Academy - Tech City-developed online digital skills training for business.
Enterprise Nation - Online resources, directory of digital advisors (need to pay for member rights).
Google for Entrepreneurs - Site focused on Google specific products for entrepreneurs eg. Adwords, Google+, Analytics.
Digital Marketing and Social Media
Digital Mums - Train mums with in-demand digital skills to help them create stimulating, flexible careers that fit around family life. For businesses they provide high quality, flexible social media support to help them grow.