Harmondsworth Great Barn 600th Anniversary Conference

5th September 2026

LGP will be presenting at the Harmondsworth Great Barn 600th Anniversary Conference.

2026 marks the 600th anniversary of the construction of the ‘New Barn’ at Harmondsworth, the largest surviving medieval timber-framed barn in England. To celebrate this remarkable example of medieval architecture, English Heritage and the Friends of the Great Barn at Harmondsworth are hosting a conference in the Barn and the adjacent church of St Mary on 5 September 2026.

Ruth Siddall of LGP will be presenting a paper titled ‘London ferricrete and the geology of Harmondsworth Great Barn‘ on the day.

Click here for the full list of speakers and conference registration.