Figure 1: Microliths diagnostic of assemblage types. Row 1. Star Carr-type microliths from Star Carr, N. Yorks. Row 2. Deepcar type microliths from Lackford Heath, Suffolk. Row 3. A basally modified assemblage. A Honey Hill-type assemblage from Two Mile Bottom, Norfolk (redrawn from Jacobi 1984). Row 4. Small scalene triangles from Seamer K, N. Yorks (redrawn from David 1998)

Figure 2: Overall form of the chronological models for the currency of different microlith types in Britain

Figure 3: Probability distributions of radiocarbon dates associated with long blades. Each distribution represents the relative probability that an event occurs at a particular time. For each of the dates two distributions have been plotted: one in outline, which is the result of simple radiocarbon calibration, and a solid one, based on the chronological model used. Distributions other than those relating to particular samples correspond to aspects of the model. For example, the distribution '*start long blades*' is the estimated date when long blades were first used in Britain. Measurements followed by a '?' have been excluded from the model for reasons described in the text. The large square brackets down the left-hand side along with the OxCal keywords define the overall model exactly. (red: excluded from model; grey: TPQ possible old-wood effect or hard-water error; blue: TPQ/TAQ stratigraphic constraint; red: excluded from model)

Figure 4: Probability distributions of radiocarbon dates associated with Star Carr-type microliths (the component relating to Star Carr is defined in Milner *et al*. in press, appendix 17.1, and key parameters only are shown). The format is identical to Figure 3

Figure 5: Probability distributions of radiocarbon dates associated with Deepcar-type microliths. The format is identical to Figure 3

Figure 6: Probability distributions of radiocarbon dates associated with basally modified microliths. The format is identical to Figure 3

Figure 7: Probability distributions of radiocarbon dates associated with small scalene triangles (the component relating to Howick is defined by Bayliss *et al*. 2007b, fig. 6.2 and key parameters only are shown). The format is identical to Figure 3

Figure 8: Summary of the currency of Early Mesolithic assemblage types. The shading reflects the probability that an assemblage type was in use at a particular time

Figure 9: Probability distributions of radiocarbon dates associated with long blade assemblages according to the alternative model described in the text. The format is identical to Figure 3

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