This summary uses hourly tweet and retweet imports throughout April 2021 via TAGS, reimported on 9 May 2021 using NodeXL to update the number of retweets received. I've written up the method previously. View the April 2021 NodeXL map and report below - I would classify this as a "community cluster" picture, with people from different backgrounds and with different opinions forming different communities.
See March 2021 summary here, and a Lancet Infectious Diseases Media Watch article on a year and a day of #covid19uk tweets (March 2020-March 2021). 
For April 2021 I ranked the tweets for each day by descending number of retweets. I initially chose the top three tweets for each day giving 90 tweets per month. There were a few tweeters who had more than 3 tweets in this list for the full month. I selected their most popular tweets (based on number of retweets) and then went back through the list to fill in gaps. 
There were 2,394 tweeters using the #covid19uk hashtag, posting 6,531 tweets, receiving 6,588 retweets. Overall, 107 tweeters (4.5% of the total) received 80% of retweets, while 1,650 tweeters (69% of the total) received no retweets. For those 73 tweeters with tweets included in the list below, their selected tweets received a median of 11 retweets (range 2-789, interquartile range 7-21).
As with previous summaries there are a wide of views represented, with some posts expressing highly questionable views. I have left these posts in the summary as they may help understand sceptical opinions in future study. You can download a permanent record of these tweets in a PDF version of this summary. View the May summary here.

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