Bell Beakers are not common in Portuguese ditched enclosures. Well, in the small ones. There, they are virtually unknown. Even in those built in bell beaker times.
But at the enclosures that grew bigger, to became large ones, like Perdigões and Porto Torrão, beakers are present and they can be very well represented (as it happens in Porto Torrão).
But that is not it. A pattern emerged in the last years. In small sites, sometimes reoccupations of walled enclosures (but never ditched ones), we tend to have beakers of a mono style (maritime, or incise, or combed geometric). But the large ditched enclosures are the only ones where we have all these styles together.
A paper of mine has recently been published on this issue here.
Notice that in the maps, Perdigões is told to only have maritime and incised beakers. Well, this summer things changed, and combed geometric beakers also are present.
In fact, as Perdigões, Porto Torrão and Bela Vista 5 chronologies show, at beaker times ditches were still being built in west Iberia. Sometimes enlarging previous enclosures (like in Perdigões), sometimes creating original enclosures (like at Bela Vista 5).
But only in the big ones we have the presence of the three main styles. Another sign of the social role of these large enclosures.