The following is adapted from my book, King Alfred: A Man on the Move, available from Amazon It would be great if you could support this project by purchasing a copy.
Wimborne (or Wimborne Minster) is a significant historic town in Dorset and is the location of the important Wimborne Minster, which has a history going back to the 8th century. Most versions of the Anglo-Saxon Chronicles tell us that after the 871 AD battle at Meretun (unknown location, but possibly Martin in Hampshire) King Æthelred, Alfred’s older brother, was buried at Wimborne. However, one version of the Anglo-Saxon Chronicles tells us that he was buried at Sherborne, which seems plausible as the two previous kings and brothers of Alfred, Æthelbald and Æthelbehrt, had been buried there. I consider it possible that Æthelred was initially interred at Wimborne, and then later moved to Sherborne, probably because of the relative importance of the latter location. It is further recorded that Alfred had been present at his brother’s funeral rites, which is what we would expect.
We know that Alfred himself became king after the death of King Æthelred, although the location where this formally took place has not been recorded. I suggest, however, that there is a very good chance that Alfred became king at Wimborne, particularly if he had already been designated as next in line, which Asser tells us was the case. Alfred’s immediate elevation on the death of his brother also makes sense in the context of the kingship having run sequentially through Æthelwulf’s sons up to that point. It should be borne in mind, however, that just because we are told that Æthelred had been buried at Wimborne does not mean that he died there, with this meaning that Alfred could have become king somewhere else. Nonetheless, Wimborne seems plausible because we know that it had significance because the royal estate there was seized in 899 by Æthelwold after Alfred’s death (if it was significant in 899 it seems likely that had been so in 871).
The battles that took place in 871 indicate that Wessex was clearly in a state of emergency at the time King Æthelred died, and perhaps the formal ceremonial arrangements of Alfred’s accession were delayed until the relatively peaceful period between 872 and 874 when the Vikings that had been at Reading were causing trouble in Mercia and Northumbria instead. If there was ever a formal ceremony, we have no evidence of it. It has been suggested that Alfred became king in Winchester, but I have seen no evidence of this. Furthermore, it appears that Kingston-upon-Thames had not yet become (as it would) the favoured site for the consecration of the Anglo-Saxon kings.