a additional vs an additional

Some examples from the web:

• Alongside other initiatives, the European Heritage Label is a additional way of bringing the European Union closer to its citizens and strengthening their sense of belonging to Europe.
• This can also be achieved by means of a additional file clearly linked to the master file.
• Depending on the seriousness of the deficiencies found and the immediate follow up action taken, the flag State should in addition consider carrying out a additional survey of the ship after it has been released from detention.
• The length shall be included either in the lower part of the panel or on a additional panel H2.
• If the RGBA radio button is clicked, a image is created similar at the RGB Decomposing with a additional Alpha layer filled with the transparencies values of the source image. Full transparent pixels are black and the full opaque pixels are white.
• With a little, additional oversight.
• Finally, a number of additional amendments have been tabled.
• Madam President, I still have a few additional questions.
• Thus, even rapidly rising energy prices imply only a limited additional cost burden for firms.
• A new Additional note to Chapter 21 is therefore needed to clarify the classification of those products.
• Any fresh gas drilling in the Waddenzee would create a severe additional threat.
• This valid safety requirement imposes a significant additional financial burden on families with several small children.
• The pantograph gauge has a specific additional overthrows.
• This initial finding leads me to make a few additional comments, however.
• This target was estimated to involve an increase of around half a million additional researchers.
• I have just had a few additional blood tests taken.
• Our company policy requires a small additional fee against any unforeseen complications.
• - places a considerable additional cost burden on private funded pension schemes.
• But I would also like to say a few additional words about the report.
• Combined with hydrochlorothiazide, a significant additional reduction in blood pressure is achieved.

Some examples from the web:

• The negative results for 2004 amount to an additional 55,8 % of that capital.
• However, sensor efficiency has increased by only an additional 1.3 percent.
• This at least gave the appearance that the Commissioner had an additional opportunity to bolster his submissions.
• Suppose you were to send an additional military force into Boston.
• Electronic networks for research is an additional point.
• The further reform proposed amounts to an additional turn of the screw.
• Therefore it entails an additional selective advantage for PCT.
• Therefore, Directive 2003/48/EC should continue to apply to Austria for an additional one-year period.
• The humanitarian crisis that these actions generate is an additional reason for our concern.
• Charges which are merely intended to provide an additional source of State revenue are unacceptable.
• There is therefore no space to accommodate an additional operator.
• This constitutes an additional breach of decision N 513/01.
• Moreover, increased transparency would create an additional incentive to meet the highest demands.
• The Rule provides an additional opportunity to debate human rights at the level of committees.
• Contingent liabilities constitute an additional risk which will be monitored accordingly in this context.
• Therefore, an additional check of the AT activity level should be done after the surgery.
• The maximum dosage of 600 mg per day may be achieved after an additional week.
• Following an additional week the dosage may be increased to 450 mg per day.
• The first call was to extort an additional quarter million from Kane Software.
• AIS is an additional source for navigational information.