The Information Commissioner's Office (ICO) publishes a great deal of useful information for all organisations on data protection and compliance with data protection law.
For small businesses and sole traders, the ICO has also created a small business data protection checklist to allow them to assess how well they comply with data protection law. This can be found here and should only take a few minutes to complete.
If you are unsure about how the GDPR and DPA affect your organisation, we can advise you. In October alone the ICO announced that fines totalling £825,000 had been levied on three organisations for breaches of data protection law or nuisance calling.
It is better to be safe than sorry.