There were fresh concerns for the Queen's health today, after the 86-year old monarch canceled another raft of engagements this week, following her hospitalization with symptoms of gastroenteritis.

The cancellations are attracting attention precisely because the queen so rarely misses engagements, but nonetheless pressure is now growing for her to reduce her workload.

She attended 425 official events last year, justifying her work rate with the mantra: “I have to be seen to be believed.”

Buckingham Palace issued a statement this afternoon saying: “The Queen continues to make a good recovery following her recent illness, and today she presented The Queen’s Gold Medal for Poetry and held a series of Audiences.

“However, regrettably, she will no longer attend the Tech City engagement planned for Wednesday, or the Soldiers’ and Airmen’s Scriptures Association Service at the Guards Chapel on Thursday. Her Majesty will, however, continue with the usual rhythm of business at Buckingham Palace, including holding a Privy Council meeting tomorrow."

Yesterday, she had been due to attend a Commonwealth service at Westminster Abbey, but canceled at the last-minute following medical advice, although she went ahead with a reception for Commonwealth leaders the same evening.