Britain is regretting the rail link, these days. The last thing they want is a bridge.
The “Chunnel” was probably the best engineering compromise that could be made at this time, in that it does not interfere with surface ship traffic, requires no deep-set pylons, is resistant to most weather conditions, and the access is more easily controlled at both ends.
If anything, additional similar “Chunnels” may continue to be the best options for transport of large numbers of both people and merchandise between France (or other points in Europe) and England, as ships require considerable infrastructure for both loading and unloading cargo, for a comparatively short journey.