You do not need a degree anymore.
CHARTERED ENGINEER (CEng)
4.2 Applicants with a valid EASA Part-66 Cat B1/B2 licence who have qualified for an EASA Part-66 Cat C licence without a degree can still be considered for CEng-see para 4.3.
4.3 All applicants without the exemplifying (i.e. accredited) qualifications for registration will need their
formal and informal education assessed by the Society’s Individual Assessment Panel (see Section 3 of the Registration Handbook)