Catholics were due to gather at cathedrals across the country as the rededication ceremony took place at Walsingham. But when churches were ordered to close due to the pandemic, Catholics were asked to follow the ceremony live from their homes on the shrine's website instead. So many logged on that the site crashed.
"The rededication of England was phenomenal," Armitage said. "It overwhelmed our server. We had to transfer to YouTube. That rather took us by surprise."
In his homily at the rededication, Armitage said: "We have long pondered and treasured the words of Pope Leo XIII to an earlier generation of bishops: 'When England returns to Walsingham, Our Lady will return to England.' In the hour of our need Our Blessed Mother has indeed returned to England."
Armitage, a pastor from the gritty East End of London, was appointed rector in 2014 with a mandate to revive the shrine located deep in the Norfolk countryside.
Today he marvels that the rededication coincided with what may be England's worst crisis since the Second World War.
"Three years ago, where did that come from?" he asked. "Was that just an East End rector trying to drum up some trade? If I was being a bit cynical I might think that. But no, not at all. It was very, very much Our Lady's guidance."
The shrine at Walsingham was established by the noblewoman Richeldis de Faverches after she experienced a series of Marian apparitions in 1061. Our Lady asked her to build a replica of the house where the Annunciation took place. In medieval times, the shrine -- known as "England's Nazareth" -- ranked alongside Rome, Jerusalem and Santiago di Compostela.
Armitage, whose five-year term as rector ends in September, said the crisis had given him new insight into Walsingham's mission.
"When I first came here, the bishops asked me to develop the place. I thought that was about buildings. I realized eventually that it wasn't about that. It was about the development of the message of Our Lady of Walsingham," he explained.
"Wherever Our Lady appears, there's always a message that she brings. The key to understand Our Lady is what happened after the Annunciation. She went on Visitation. And she's not stopped since. Whether it's her cousin Elizabeth or the children in Fatima, or at Lourdes or Guadalupe, Our Lady is always on the visit. That's what your mother does, isn't it? She comes to keep an eye on you."
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He continued: "Here at Walsingham, we had kind of lost the message, insofar as England had lost the message. What was the message of Walsingham? It was very clearly: 'Share my joy at the Annunciation.' So Walsingham is a Marian shrine of the Incarnation, and it's about joy."
Armitage hopes the 24-hour program will continue after churches reopen in England. Under current government plans, places of worship will be able to open from July 4, weeks after "non-essential" shops.
Armitage said that although the past two months had been exhausting, he was grateful to have been able to help people pray together during the lockdown.
"It's such a privilege to be able to play a very small but very significant part in helping them to bear the agony and the loneliness in these last months," he said.
"That's not something we can stop. Prayer sustains people. And that is essential. That's why -- not wishing to be political -- the government needs to recognize that for many people they need that presence in their life."
He acknowledged that the cancellation of pilgrimages would strain the shrine's finances.