We present constraints on the cosmological constant \lambda _ { 0 } from gravitational lensing statistics of the Jodrell Bank-VLA Astrometric Survey ( JVAS ) .
Although this is the largest gravitational lens survey which has been analysed , cosmological constraints are only comparable to those from optical surveys .
This is due to the fact that the median source redshifts of JVAS are lower , which leads to both relatively fewer lenses in the survey and a weaker dependence on the cosmological parameters .
Although more approximations have to be made than is the case for optical surveys , the consistency of the results with those from optical gravitational lens surveys and other cosmological tests indicate that this is not a major source of uncertainty in the results .
However , joint constraints from a combination of radio and optical data are much tighter .
Thus , a similar analysis of the much larger Cosmic Lens All-Sky Survey should provide even tighter constraints on the cosmological constant , especially when combined with data from optical lens surveys .

At 95 % confidence , our lower and upper limits on \lambda _ { 0 } - \Omega _ { 0 } , using the JVAS lensing statistics information alone , are respectively -2.69 and 0.68 .
For a flat universe , these correspond to lower and upper limits on \lambda _ { 0 } of respectively -0.85 and 0.84 .
Using the combination of JVAS lensing statistics and lensing statistics from the literature as discussed in Quast & Helbig ( 18 ) the corresponding \lambda _ { 0 } - \Omega _ { 0 } values are -1.78 and 0.27 .
For a flat universe , these correspond to lower and upper limits on \lambda _ { 0 } of respectively -0.39 and 0.64 .