If a contractual delivery date is agreed or becomes a term of the Contract by operation of law such term shall not become of the essence and the sole legal liability of BWE for failure to meet such date shall, if the Purchaser shall suffer loss thereby, be to pay to the Purchaser, liquidated damages of 0.2% of the Contract value of the goods in delay for each week of such delay but the total sum so payable shall not exceed 5% of the Contract value of such goods. Save as expressed in this clause BWE shall have no liability whatsoever for any delay in delivery