Alongside the emergence of various populisms, Brexit and other contemporary geopolitical events have been presented as symptomatic of a generalizing and intensifying sense of uncertainty in the midst of a crisis of (neo)liberalism. In this paper we describe what kind of event Brexit is becoming in the impasse between the UK's EU referendum in 2016 and its anticipated exit from the EU in 2019. Based on 108 interviews with people in the North-East of England, we trace how Brexit is variously enacted and felt as an end, advent, a harbinger of worse to come, non-event, disaster, and betrayed promise. By following how these incommensurate versions of Brexit take form and co-exist we supplement explanatory and predictive approaches to the geographies of Brexit and exemplify an approach that traces what such geopolitical events become. Specifically, we use the concept of 'modes of uncertainty' as a way of discerning patterns in how present uncertainties are lived. A 'mode of uncertainty' is a shared set of practices animated by a distinctive mood through which futures are made present and felt. Rather than

There is broad agreement that the need to decarbonise and make better use of renewable and more intermittent sources of power will require increased flexibility in energy systems. However, organisations involved in the energy sector work with very different interpretations of what this might involve. In describing how the notion of flexibility is reified, commodified, and operationalised in sometimes disparate and sometimes connected ways, we show that matters of time and timing are routinely abstracted from the social practices and forms of provision on which the rhythms of supply and demand depend. We argue that these forms of abstraction have the ironic effect of stabilising interpretations of need and demand, and of limiting rather than enabling the emergence of new practices and patterns of demand alongside, and as part of, a radically decarbonised energy system. One way out of this impasse is to conceptualise flexibility as an emergent outcome of the sequencing and synchronisation of social practices. To do so requires a more integrated and historical account of how supply and demand constitute each other and how both are implicated in the temporal organisation of everyday life. It follows that efforts to promote flexibility in the energy sector need to look beyond systems of provision, price, technology, and demand-side management narrowly defined, and instead focus on the social rhythms and the timing of what people do.

This paper introduces a materialist approach to Isin's concept of 'acts of citizenship' to call for an attention to the lively and agential materials that mediate citizenship claims. It describes two ways in which materialism helps progress conceptualisations of citizenship. Firstly, it demonstrates the ways in which a materialist viewpoint forces a reconsideration of 'acts of citizenship' as undertaken by heterogeneous collectives, rather than them being the sole responsibility of human actors. Secondly, it suggests that, because acts of citizenship arise out of socio-material entanglements, they may exceed the apparent intentions of human subjects. This paper argues that materials are more than bystanders in claims to citizenship; they actively mediate and facilitate encounters through which political claims are made. This argument is developed through a detailed empirical study of the materials permitted to circulate from Immigration Removal Centres during a community exchange project organised by the charity Music in Detention.

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