Complex sentence: Plans were to extend it, over the railway to Bapchild, and onwards to the Kent Science Park near Highsted, before joining the M2 Motorway, but these have been put on hold due to cost and planning issues.
Split into simpler sentences: Plans were to extend it, over the railway to Bapchild, and onwards to the Kent Science Park near Highsted, before joining the M2 Motorway. But these have been put on hold due to cost and planning issues.