Heavier trains cause new delays

The Surrey Comet reports that the new trains introduced by SWT are much heavier than their predecessors and are causing problems and delays as they are too heavy for the existing track, see http://www.surreycomet.co.uk/news/localnews/display.var.1655106.0.heavy_trains_cause_delays.php.

The present writer believes that they were tested for all sorts of things before being brought into service. Evidently suitability to run on existing British track would seem not to have been one of them. Is this a consequence of the separation of track providers from train operators 14 years ago. Sir John Major disclosed in a recent interview that his first instinct had been to  keep responsibility for track and rolling stock in the same hands and privatise both together (as had been the case on railways from 1825 to 1947). Perhaps he should have stuck to his initial idea rather than letting the experts dissuade him from following it……..