But everyone sits down and re-negotiates, that is business!
Most profitable agile companies do this, as for LBC suppose they only look as far as the steps of the Town Hall, I quote from their own Web Site;
"Welcome to Luton Borough Council Business pages. Luton is a thriving, growing Town and is an ideal location for your business. Whether you are looking to start up a business, grow your business or locate your business to Luton, we are here to provide you with all the help and information to help you acheive this."