Could you please give the old-fashioned imperial measurements (ounces, etc.) in your recipes?
Most cookbooks have now fully moved to the metric system for weight and volume as metric is widely used and accepted. Most scales also have metric and imperial measurements too. In Nigella's UK books gas mark is still given for convenience.
If you wish to convert the metric measurements to imperial then as a rule of thumb you can convert using 25g = 1 ounce. But always make sure that you use only one set of measurements, don't mix imperial and metric measurements as the ratios of the recipe can be affected. For volume one UK imperial pint/20 fluid ounces is 600ml so 30mls is 1 fluid ounce. For length 2.5cm equals one inch. A list of some of the more common measurements is below, this is a slightly more accurate list than converting at 25g to 1 ounce.
110g = 4 oz
225g = 8oz
340g = 12 oz
450g = 16 oz/1 pound
Volume (pint measurements are UK)
150ml = 5 fl oz/ 1/4 pint
300ml = 10 fl oz/ 1/2 pint
450ml = 15 fl oz/ 3/4 pint
600 ml = 20 fl oz/ 1 pint