I have been provided with the following reference (obituary)

http://www.humphreysfh.com/Obituaries/133356/

James A. Stewart, ONB, DFC, CA, (Jim Stewart) of St. Andrew's NB, died peacefully at Charlotte County Hospital, on April 17, 2019, surrounded by loving family members. He had been predeceased by three months to the day by wife Jan. He was also predeceased by brother Daniel, and sisters Janet and Penuel. He is survived by sons Jim (Jane), Ian (Michele) and Barry(Diane); seven grandchildren,Maggie, Cameron, Lindsay, Alex, Brittany, Jonathan and Taylor: two step-grandchildren, Stephanie and Kimberley; two great-grandchildren, Kayla and Alyssa.

A native of Glasgow, Jim found himself in Canada for Royal Air Force flight training. During World II, his varied career saw him join a small band of volunteers known as “Catafighters,” with their specially adapted Hawker Hurricanes launched from the decks of merchant ships by rocket-propelled catapults.
These were one-way missions designed to protect convoys, since the pilots had nowhere to land after takeoff. In one such engagement, Jim challenged and destroyed an FW200 Condor bomber, bailed out and was picked up by one of the convoy ships.

Flying a Typhoon over France in 1944, he was hit with anti-aircraft fire, and forced to bail out. Evading capture, he was hidden by French citizens, and eventually aided by the French Resistance, who even sheltered him in occupied Paris. But an eventual betrayal by a Gestapo agent led to detention in the infamous Fresnes Prison. As the Allied armies advanced on Paris, prisoners were then crammed into box cars in abhorrent conditions, for a five-day trip to Germany. Their final destination was none other than Buchenwald Concentration Camp. After two months there, with further advances by the Allied
Armies, it was forced marches in winter, and two POW camps before final liberation by the Russians.

For his military service, Jim was awarded the Distinguished Flying Cross, the 1939-45 Star, the Atlantic Star and Bar, the France and Germany Star, the Defence Medal and the Imperial War Medal.

He always cringed if the term “hero” were used in reference to him; he described himself rather as “one of the lucky ones.” To him, the real heroes were the ones who never came home.

After the War, Jim emigrated to Canada, beginning a long and rewarding career with Connors Brothers of Black's Harbour, becoming Senior Vice-President (marketing) that made him business associates and friends around the globe. After retirement he moved to St. Andrew's and began serving his new community. He took great delight in reading (with his Scottish accent) to children in elementary school.

To a host of kids he was (and still is) their friend and their“Granddad Jim.” And he would read to seniors in nursing homes as well. To the bewilderment and amazement of his family, as an old man he would deliver Meals on Wheels to old people! On one fateful day, he fell face-first. He would later tell his family, through a black eye and facial lacerations, that he “managed to save the dessert.”
He also took tremendous pride in being appointed Honorary Colonel of 403 Helicopter Squadron, Base Gagetown.

In 2002 Jim was awarded the Order of New Brunswick, and the following year received the Governor General's Caring Canadian Award. There are other awards and affiliations too numerous to mention, so many friends who will now miss him, so many lives he touched in so many different ways. For someone who saw the darkest side of humanity, he was a bright and gentle light.

In his own words: “...I jealously cherish the friendships and camaraderie of all the wonderful people I was privileged to meet. I abhor unclean toilets; cannot
abide pettiness; have no time for fools; have respect for my fellow man regardless of position or status, but confess to be particularly resentful of any authority, however highly placed, which, in my opinion, acts without compassion or disregards the
dignity and freedom of the individual.”

My own (partial) list of RAF awards includes the following (although I do not know anything of his subsequent Typhoon service):

STEWART, James Alexander, F/O (128449, Royal Air Force Volunteer Reserve) - Merchant Ship Fighter Unit - Distinguished Flying Cross - awarded as per London Gazette dated 1 October 1943. RCAF AFRO 2258/43 has citation under heading "RAF Trained in Canada" (attended No.39 SFTS). Although the text identifies his opponent as a FW.190, this was actually a FW.200; the date was 5 August 1943, his ship the SS Empire Darwin, and the position was 43 degrees three minutes North, 16 degrees six minutes West.

This officer has always proved exceptionally keen to engage the enemy. In July 1943 his aircraft was successfully launched by catapult to defend a convoy from an approaching Focke-Wulfe 190. He made several telling attacks on the assailant and succeeded in destroying the enemy aircraft although his own ammunition was exhausted in the course of the combat as he was flying out of range of land. He then baled out and was rescued. Flying Officer Stewart's gallant action was largely responsible for saving the convoy from damage.