Personal data means data which relate to a living individual who can be identified –
(a) from those data, or
(b) from those data and other information which is in the possession of, or is likely to come into the possession of, the data controller,
and includes any expression of opinion about the individual and any indication of the intentions of the data controller or any other person in respect of the individual.
Source: https://ico.org.uk/for-organisations/guide-to-data-protection/key-definitions/
Sensitive personal data means personal data consisting of information as to -
(a) the racial or ethnic origin of the data subject,
(b) his political opinions,
(c) his religious beliefs or other beliefs of a similar nature,
(d) whether he is a member of a trade union (within the meaning of the Trade Union and Labour Relations (Consolidation) Act 1992),
(e) his physical or mental health or condition,
(f) his sexual life,
(g) the commission or alleged commission by him of any offence, or
(h) any proceedings for any offence committed or alleged to have been committed by him, the disposal of such proceedings or the sentence of any court in such proceedings.
Source: https://ico.org.uk/for-organisations/guide-to-data-protection/key-definitions/
Processing, in relation to information or data, means obtaining, recording or holding the information or data or carrying out any operation or set of operations on the information or data, including –
(a) organisation, adaptation or alteration of the information or data,
(b) retrieval, consultation or use of the information or data,
(c) disclosure of the information or data by transmission, dissemination or otherwise making available, or
(d) alignment, combination, blocking, erasure or destruction of the information or data.
Source: https://ico.org.uk/for-organisations/guide-to-data-protection/key-definitions/