RE: £2 million buy on Friday after hours has Myles very pleased27 Mar 2021 18:52
Complex topic. Frequently - and understandably - misunderstood in general LSE conversation. Some background info...
Trade publication can be delayed in accordance with what LSE (not this one, the real one...) call their "parameters". Publication delay is at the request of the counterparties. In simple terms the larger the trade compared to normal volume, the longer the delay permitted. The parameters are complex, but driven principally by ADT - the average daily turnover. For individual trades greater than a certain %'s of ADT, publication may be delayed by varying amounts up to three days. One of the ADT thresholds is 730k so this order of 761k just clears that which probably secured a delay to the end of the next trading day.
So I think we know only that this trade took place on the 25th or 26th. Looking at the prices printed, it's more likely to have been a Thursday 25th trade. At 248p it could be either a buy or a sell. It's toward the bottom of the daily range so either a good buy or a poor sell... But it's well below the TR1 level, so we're unlikely to find out unless it is an existing holder crossing a threshold (in either direction).
[You can't compare the published price with the quoted spread at time of publication, because that spread is irrelevant. So anyone suggesting it's a buy on this basis is just wrong.]
Sorry it's not possible to be more definitive.
TLDR; it's a buy or a sell, probably on 25th. There isn't enough information available to conclude which.