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UK employment services are increasingly delivered by public, private and third sector organisations in quasi-markets that can be viewed as fields with actors (providers) competing for resources and position. The commissioning of the Work Programme produced an ‘episode of contention’ as fewer resources, shifting policy priorities and new contractual arrangements restructured relationships within the field. Drawing on empirical research the paper demonstrates how providers with different resources have navigated this period, employing strategies to manage challenger and incumbent roles and maintain their position in the field. The findings contribute to both field theory and our theoretical understanding of employment services.

Excimer laser fragmentation-fluorescence spectroscopy is an effective detection strategy for NH(3) in combustion exhausts at atmospheric pressure and high temperatures. Two-photon photofragmentation of NH(3) with 193-nm light yields emission from the NH(A-X) band at 336 nm. There are no major interferences in this spectral region, and the sensitivity is at the parts per billion (ppb) level. Quenching of the NH(A) state radical by the major combustion products is measured and does not limit the applicability of the detection method. Detection limits in practical situations are of the order of 100 ppb for a 100-shot (1-s) average. This technique could prove useful in monitoring ammonia emissions from catalytic and noncatalytic NO(x) reduction processes involving ammonia injection.

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