I think the answer to your question depends upon which roles you are seeking in the IT Industry. Are you seeking a project management (PM) role, or a more technical role?
If you are seeking a PM role, then in the UK, PRINCE2 is the usual qualification which employers are seeking. I used to be a contract PM in the IT industry and recruitment agencies 8 years ago were recommending me to become PRINCE2 qualified, which is what I did. If however, you are seeking a PM role in the US, or in Asia, then probably get the PMI certification because PRINCE2 is not really known in these areas, but PMI is well known there.
To be honest, it is rare to see APM PM qualifications asked for in the UK.
On the other hand, if you are seeking a more technical role, for example in IT support, then I would recommend the ISEB ITIL qualifications. ITIL is used all over the world, so these qualifications are useful in any country. Within the ISEB qualifications there are a wide range to choose from: software testing if this is the career you want, business analysis if you want to get into change management, solution development if you want to get into systems analysis and design, and ITIL if you want to get into IT support.
So, I think you need to figure out what role exactly do you want to do.
As a PRINCE2 trainer, I can tell you the demand PRINCE2 training is hugely popular as are the ITIL qualifications. Within the ISEB set, business analysis qualifications are becoming more and more popular. I hope that helps.