Spectra of six objects detected with LOFAR, and also reported at 408 MHz by Wills et al. (1997). Five of these are compact and listed in Table 2, while “47.37+68.0” is resolved and discussed in Sect. 4.6. These objects show evidence of a low-frequency turn-over at LOFAR frequencies. LOFAR data points are plotted in red. Non-LOFAR data points are VLA and MERLIN, as presented in Table 2 by Allen & Kronberg (1998). A model of SNR spectra was fitted to each object as described in Sect. 4.5. The best fit spectral index α and emission measure EM are given in the respective figure title.