1 HERITAGE OPEN DAYS

Celebrating English architecture and culture with free access to properties usually closed to the public, including churches, schools, meeting houses, Masonic halls, crown courts and many more.
Various venues around England (www.heritageopendays.org.uk), from Thur, until Sept 14

2 REGENT STREET FESTIVAL

This year’s theme is a Great British Experience. The street will be closed to traffic in order to host film screenings, live music, exhibitions, vintage cars, gourmet food stalls, a pop-up vodka bar and competitions.
Regent Street and around, W1 (www.regentstreetonline.com), Sun

3 ASTRONOMY FESTIVAL

Featuring a chance to meet the BBC Sky at Night team, attend lectures and take a tour of the telescopes and the Space Geodesy Facility.
Herstmonceux Observatory Science Centre, Wartling Road, Hailsham (www.the-observatory.org 01323 832731), until Sun

4 ENIGMA FAMILY FESTIVAL AND ENIGMA REUNION

A day celebrating the cracking of the wartime Enigma codes and the men and women who worked in secret there.
Bletchley Park, Bletchley, Wilton Avenue, Milton Keynes (www.bletchleypark.org.uk 01908 640404), Sun

5 WATCH THIS SPACE

The UK’s longest outdoor festival, celebrating its 10th birthday this year. Includes theatre, music, dance, film and outdoor spectacles with national and international theatre companies and musicians.
National Theatre, South Bank, SE1 (www.nationaltheatre.org.uk/wts 020-7452 3400), until Sept 28

Explore What's On

• London Microguides