Prevention of Future Deaths reports · 2023

Jonathan Mann and Margaret Costa

Regulation 28 report to prevent future deaths, reference 2023-0307, written 24 Aug 2023. A coroner writes one of these when an inquest reveals a risk that could cause further deaths unless something changes.

Date of report24 Aug 2023
Reference2023-0307
DeceasedJonathan Mann and Margaret Costa
CoronerSamantha Marsh
Coroner areaSomerset
CategoryOther related deaths
Sourcejudiciary.uk record · original PDF
Responses publishednone published

The report

Text extracted from the PDF text layer. Reproduced verbatim, including the scan's own layout.

ANNEX A 

REGULATION 28:  REPORT TO PREVENT FUTURE DEATHS 

REGULATION 28 REPORT TO PREVENT FUTURE DEATHS 

THIS REPORT IS BEING SENT TO: 

1. Civil Aviation Authority of

Canary Wharf
London
E14 4HD.

2. Military Aviation Authority of
Regulatory Publications Team
#5102 Level 1
Juniper Building
MOD Abbey Wood (North)
Bristol
BS34 8QW
United Kingdom

1  CORONER 

I am Mrs Marsh, Senior Coroner for the coroner area of Somerset. 

2  CORONER’S LEGAL POWERS 

I make this report under paragraph 7, Schedule 5, of the Coroners and Justice 
Act 2009 and Regulations 28 and 29 of the Coroners (Investigations) Regulations 
2013. 

3 

INVESTIGATION and INQUEST 

On the 16th September 2021, my predecessor, Mr Tony Williams, commenced an 
investigation into the deaths of Jonathan Paul Bost Mann, aged 69 and Margaret 
Jean Costa, aged 74.  

The investigation concluded at the end of the inquest on 22nd August 2023. 

The conclusion of the inquest was: 

Jonathan Paul Bost Mann’s death was recorded as a death by Misadventure, with 
the medical cause of his death being given as: 
Ia)  Multiple Injuries 

Margaret Jean Costa’s death was recorded as an Accidental Death, with the 
medical cause of her death being given as: 
Ia)  Multiple Injuries 

Mr Mann and Mrs Costa died within the same incident and so their inquests were 
heard together. 

1 

 4  CIRCUMSTANCES OF THE DEATH 

Mr Mann had held his pilot’s licence since 2000.  He had owned his plane, a Cap-
10-B since 2014. He had a current and valid private pilot’s licence which 
permitted him to fly under Visual Flight Rules (“VFR”).  Mr Mann did not possess 
the skills, experience of ability to fly in cloud; he could only fly in clear skies as he 
was unable to “instrument fly” and could only fly by reference to what he could 
see out of the window. 

His passenger on the day, Mrs Costa, had no flying experience and did not 
possess a pilot’s licence.  She had no active part in the events that unfolded. 

On 12th August 2021 at 08:04 Mr Mann took off from Watchford Farm, Yarcombe 
near Taunton, Somerset with Mrs Costa on a planned pleasure trip for the day to 
the Isle of Sicily.  There was no evidence that Mr Mann had used recognised 
aviation sources to check the weather prior to departure, instead obtaining 
weather information from news weather-based apps. 

At around 09:10 the weather conditions deteriorated and so Mr Mann turned 
back. At around 10:10 found himself at an altitude of 7,500ft flying above cloud, 
He was not qualified to fly through cloud. He contacted the Distress and Diversion 
Cell (“D&D Cell”) on the emergency frequency for assistance. 

Mr Mann began to descend to a lower altitude but he appears to have become 
spatially disorientated due to the extreme stress of flying in the weather 
conditions in which he found himself and when he emerged from cloud, the 
ground was not where he expected it to be.  The plane collided with a large oak 
tree at Lower Colley Farm, Buckland St Mary near Chard, Somerset and was 
destroyed on impact with both the pilot and passenger being thrown from the 
wreckage and suffering catastrophic injuries that were incompatible with life. 

5  CORONER’S CONCERNS 

During the course of the inquest the evidence revealed matters giving rise to 
concern. In my opinion there is a risk that future deaths could occur unless action 
is taken. In the circumstances it is my statutory duty to report to you. 

The MATTERS OF CONCERN are as follows.  –  

The D&D cell did not request or receive any critical information about  

(i) 

(ii) 

(iii) 

the pilot’s capabilities (i.e that he could not instrument fly and/or fly in 
cloud);  
the plane’s capabilities (i.e. that it was not equipped to allow the pilot 
to instrument fly) 
the weather conditions at the selected diversion aerodrome (to ensure 
that the weather was more favourable to the conditions at the home 
aerodrome). 

Checklists and aide memoires were not used by those on the ground and, 
consequently, there was a lack of knowledge and/or appreciation of the 
unsuitability of the selected airport (Exeter) as a viable diversion destination; 
despite it being the closest in geographic proximity.  There was no immediate 
requirement for urgent assistance as the pilot had fuel for a further 1.5hours of 

2 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 flying time and so there was sufficient time for key information to be obtained, 
analysed and shared between the D&D Cell and Exeter ATC. 

The incorrect assumptions, misunderstandings and miscommunications between 
the D&D Cell and Exeter Air Traffic Control limited the ability of those on the 
ground to provide adequate assistance to a pilot in distress. 

6  ACTION SHOULD BE TAKEN 

In my opinion action should be taken to prevent future deaths and I believe your 
organisation have the power to take such action.  

7  YOUR RESPONSE 

You are under a duty to respond to this report within 56 days of the date of this 
report, namely by 19th October 2023. I, the coroner, may extend the period. 

Your response must contain details of action taken or proposed to be taken, 
setting out the timetable for action. Otherwise you must explain why no action is 
proposed. 

8  COPIES and PUBLICATION 

I have sent a copy of my report to the Chief Coroner and to the following 
Interested Persons: 

(i) 
(ii) 
(iii) 

 (on behalf of the Mann Family) 

 (on behalf of the Costa Family) 

The Air Accident Investigation Bureau (AAIB) 

I am also under a duty to send a copy of your response to the Chief Coroner and 
all interested persons who in my opinion should receive it.   

I may also send a copy of your response to any other person who I believe may 
find it useful or of interest.  

The Chief Coroner may publish either or both in a complete or redacted or 
summary form. He may send a copy of this report to any person who he believes 
may find it useful or of interest.  

You may make representations to me, the coroner, at the time of your response, 
about the release or the publication of your response. 

9 

24th August 2023                                              

3

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