Incident Overview · Fan Surge / Water Rescues
Mallory ParkBBC Radio 1 Fun Day
On 18 May 1975, a huge BBC Radio 1 Fun Day crowd gathered at Mallory Park in Leicestershire. When the Bay City Rollers arrived by helicopter near the lake/island area, fans surged across the racing circuit and into the water, leading to rescues, disorder and reported injuries.
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Core Facts
What Happened
Incident nameMallory Park BBC Radio 1 Fun Day
Date18 May 1975; one source gives 18 Apr 1975
LocationMallory Park motor racing circuit, Kirkby Mallory, Leicestershire
Reported injuriesMost sources: 4 hospital, 35 treated; one later source: 5 hospital
Reported fatalitiesNo fatalities found in reviewed sources
Summary
Watery Mayhem
The best-supported account places the incident at Mallory Park on 18 May 1975 during a BBC Radio 1 Fun Day featuring motorsport and pop acts. The Bay City Rollers’ appearance was the trigger point repeatedly identified in later reporting.
Sources describe fans rushing across the circuit and into the lake or lagoon after the band arrived by helicopter near the island/stage area. The Three Degrees, Showaddywaddy and David Hamilton are also tied to the event in supporting accounts.
The incident appears to have caused injuries and on-site treatment rather than fatalities. The most repeated casualty wording is four taken to hospital and 35 treated on site, but this is not fully settled.
Quick View
Incident Highlights
1975
Year
The best-supported incident date is 18 May 1975.
47,000
Crowd Reported
Repeated by several motorsport and Radio 1 sources.
4–5
Taken to Hospital
Hospital count differs by source.
0
Fatalities Found
No deaths were found in the reviewed material.
Chronology
Known Sequence
Fun Day planned
BBC Radio 1 linked the event with motorsport and pop appearances at Mallory Park.
Large crowd arrives
Sources repeatedly report 47,000, with some accounts saying nearly 50,000.
Radio appeals broadcast
One Autosport account says appeals were broadcast by midday asking more people to stay away.
Bay City Rollers arrive
The band arrived by helicopter near the lake/island area, causing fans to rush across the track.
Fans enter the water
Accounts describe fans wading or trying to swim across the lake to reach the group.
Injuries and removal
Casualties were treated and several people were taken to hospital; the group was eventually removed.
Operational Picture
What Holds Up
Date Mostly Strong
18 May 1975 is repeated across stronger matching sources; April appears to be an outlier.
Location Strong
Mallory Park and the lake/island area are consistently identified.
Mechanism Supported
The fan rush into or across the water is repeated across multiple accounts.
Casualties Mixed
Treatment and hospital numbers vary, so they should not be presented as exact official figures.
⚠️ Reporting Caution The broad story is well supported. Exact casualty totals, the April/May date conflict, and whether the band performed live remain less tidy. Very rock-and-roll; very poor paperwork.
Conflicting Information
Disputed Details
Disputed Detail
Date of Incident
Most sources place the incident on 18 May 1975, but one music-history source lists it under 18 Apr 1975.
18 May 1975
Ultimate Classic Rock, Radio Rewind, RacingCircuits.info, Showaddywaddy and other matching sources.
Ultimate Classic Rock, Radio Rewind, RacingCircuits.info, Showaddywaddy and other matching sources.
18 Apr 1975
This Day In Music lists the event under April.
This Day In Music lists the event under April.
Editorial note: 18 May 1975 is the stronger date. The April listing is best treated as an outlier or typo unless a primary source proves otherwise.
Disputed Detail
Number Taken to Hospital
Sources differ on how many people were taken to hospital after the water incident.
4 hospital / 35 treated
Ultimate Classic Rock and This Day In Music repeat this figure.
Ultimate Classic Rock and This Day In Music repeat this figure.
5 hospital
Vintage Formula Ford gives five hospitalisations, including one burst appendix.
Vintage Formula Ford gives five hospitalisations, including one burst appendix.
Editorial note: four taken to hospital is more often repeated, but the later five-person account should be listed as a conflict.
Disputed Detail
Whether Bay City Rollers Performed
Sources agree they appeared, but some accounts suggest they did not perform fully or were removed before doing so.
Appeared at event
Multiple sources identify the band as present after helicopter arrival.
Multiple sources identify the band as present after helicopter arrival.
Performance unclear
Some reports say they were not scheduled for a full performance or were removed before performing.
Some reports say they were not scheduled for a full performance or were removed before performing.
Editorial note: appearance is supported; full performance is not verified.
Unverified Details
Official BBC casualty report
No primary BBC report was verified in the provided research pass.
Exact attendance
47,000 and nearly 50,000 appear; exact official attendance remains unverified.
Police or ambulance wording
No exact contemporary emergency-service wording was verified.
Full live performance
The band’s appearance is supported; whether they performed live is not settled.
Fatality reports
No fatalities were found in the sources reviewed.
Sources
Reference Cards
01
Ultimate Classic Rock · News article
How a Bay City Rollers Event Ended in Watery Mayhem
18 May 2015
Retrospective report on the BBC-sponsored Fun Day, the fan rush toward the Bay City Rollers and the reported treatment and hospital figures.
Visit Source →02
Autosport · News article
Should club racing embrace celebrity culture?
30 March 2021
Provides motorsport context and reports a 47,000 crowd at Mallory Park in 1975.
Visit Source →03
Autosport · News article
How F1 is cultivating the festival feel for fans at races
16 June 2021
Mentions the Three Degrees, Bay City Rollers, midday appeals and fans swarming across the track and into the lake.
Visit Source →04
Motor Sport Magazine · Magazine letter
When Bay City Rollers made a splash at Snetterton: Letters, February 2026
19 December 2025
Attendee recollection mentioning near-50,000 crowd, helicopter arrival and other acts.
Visit Source →05
Radio Rewind · Website
BBC Radio 1 Shows - Fun Days
No page date stated
Lists the 18 May 1975 Mallory Park Fun Day and guests including Bay City Rollers and Three Degrees.
Visit Source →06
This Day In Music · Website
Wonderful Radio 1
20 August 2018
Includes the incident but lists it under 18 Apr 1975, creating the main date conflict.
Visit Source →07
Mallory Park Circuit · Website
Find Us | Mallory Park Circuit
No page date stated
Current official location source for the circuit address at Church Road, Kirkby Mallory, Leicestershire.
Visit Source →08
RacingCircuits.info · Website
Mallory Park
No page date stated
Circuit history page describing the Radio 1 event, the island in the lake and fans wading through water.
Visit Source →09
Showaddywaddy Official Site · Website
1975 | Official Showaddywaddy Web Site
No page date stated
Confirms Showaddywaddy attendance at the Radio 1 Fun Day at Mallory Park near Leicester on 18 May 1975.
Visit Source →10
Bob Lethaby · Blog
I Wish I Had Been There When............
2012
Retrospective commentary describing the crowd, David Hamilton broadcast and fans rushing across the track and into the lake.
Visit Source →11
Vintage Formula Ford · Website
The craziest day in Formula Ford history
4 September 2025
Later motorsport article giving event detail and a conflicting hospital count of five.
Visit Source →12
Retro-Reads · Product listing
Programme Race Mallory Park 18 May 1975 BBC Radio 1 Formula Ford Escort Celeb
Product page; no date stated
Programme listing supporting the existence of the 18 May 1975 Mallory Park BBC Radio 1 event.
Visit Source →Open the Material
