Submillimetre and millimetre-wave surveys with Herschel and the South Pole Telescope have revolu- tionised the discovery of strong gravitational lenses. Their follow-ups have been greatly facilitated by the multi-wavelength supplementary data in the survey fields. The forthcoming Euclid optical/near-infrared space telescope will also detect strong gravitational lenses in large numbers, and orbital constraints are likely to require placing its deep survey at the North Ecliptic Pole (the natural deep field for a wide class of ground-based and space-based observatories including AKARI, JWST and SPICA). In this paper I review the current status of the multi-wavelength survey coverage in the NEP, and discuss the prospects for the detection of strong gravitational lenses in forthcoming or proposed facilities such as Euclid, FIRSPEX and SPICA.

ABSTRACT
1. INTRODUCTION
    1.1. Strong gravitational lensing surveys
    1.2. The North Ecliptic Pole surveys
2. GRAVITATIONAL LENSING METHODOLOGY
3. RESULTS: PREDICTIONS FOR EUCLID AND SKA
4. DISCUSSION: PROSPECTS FOR FIRSPEX ANDSPICA
5. CONCLUSIONS
REFERENCES

• Stephen Serjeant(Department of Physical Sciences, The Open University)