Probable 'fall' of Thrushes at Great Cressingham

Today was a day of fresh northerly winds and frequent, occasionally heavy showers from early morning.  These conditions continued throughout the whole day.
At about 1500hrs, I set off for a 5 mile circular walk starting at Little Cressingham Mill, eventually meeting up with the Peddars Way footpath at Great Cressingham.  The heavy rain in recent days continues to see Watton Brook water levels rising to the point where some surrounding areas of land are under significant amounts of water.
Although birding was generally quiet, the final part of this walk along the Peddars Way saw most activity, especially as dusk approached.  A particular well-hedged 250 meter section of the Peddars Way held good numbers of Thrush species.  It was of note that the majority species seen was 50+ Blackbirds, I am sure that many others were present.  Redwings and Fieldfares were also noted in good numbers.
Given the weather conditions of the day and the relatively small area within which these Thrushes were seen, it was likely that this was a localised 'fall' of birds.