although latecomers are always welcome, the classes do start at the stated times

BURY ST EDMUNDS Mondays
Benson Blakes, 88/89 St John’s Street
Weekly drop-in classes for absolute beginners 7.30-9.00, dancing until 10.00 or later.

£6 (£5 concs.) per session.
Lesson only: £5(£4)
Dancing only: £2(£1.50)

CAMBRIDGE Tuesdays (lunchtimes)
THIS EVENT IS SUSPENDED FOR THE SUMMER
Unitarian Church Hall, Victoria Street (off Emmanuel Road)
12.10pm-1.00pm or 1.10pm-2.00pm: two similar classes, both suitable for first timers or anyone else who wants to brush up on their core technique. £4 (£3 concs.), or both sessions £5 (£4).

No worries if your job/studies mean that you need to arrive late or leave early, and you are welcome to bring your sandwiches.

Private lessons also available before/after the group classes.

CAMBRIDGE Wednesdays
The Shop, 18 Jesus Lane.
The current format is:
Afternoons: classes 1.00-1.45 and 1.45-2.30, followed by practica (practice time with teacher) until 4.00
Evenings: class 7.30-9.00, practica 9.00-10.00

But do check the website as the schedule will evolve over August/September. The sessions will soon be split into Beginners and Improvers, so get in early to take advantage of longer classes and smaller numbers.
Admission £5 per session, £4 concs.

HITCHIN Wednesdays
The Sun Hotel, Sun Street (near the Market Square)

Nothing happening during August; in September this evening will run as a practica (practice session with no formal tuition).

Tuition will take the form of one-off intensive workshops on Fridays and Saturdays.

CAMBRIDGE Sundays
The Shop, 18 Jesus Lane

Class 6.00-8.00, practica 8.00-10.00 £5(£4)

Also, intermediate workshops some Sunday afternoons, call for details.